With his younger brother, writer Larry Lieber, and Jack "the King" Kirby:
Groot
Tales to Astonish #13 (November, 1960)
With writer Lieber, and artist Kirby:
Fin Fang Foom
Strange Tales #89 (October, 1961)
With the King, Stan gives birth to the Marvel Universe:
The Fantastic Four
Fantastic Four #1 (November, 1961)
With Jack Kirby:
Mister Fantastic
Fantastic Four #1 (November, 1961)
With Jack Kirby:
Invisible Woman
Fantastic Four #1 (November, 1961)
With Jack Kirby, he resurrects a Golden Age Marvel hero for the modern era:
The Human Torch (Johnny Storm)
Fantastic Four #1 (November, 1961)
With Jack Kirby:
The Thing
Fantastic Four #1 (November, 1961)
With Jack Kirby:
Mole Man
Fantastic Four #1 (November, 1961)
With writer Lieber, and artist Kirby:
Hank Pym
Tales to Astonish #27 (January, 1962)
With Kirby:
The Skrulls
Fantastic Four #2 (January, 1962)
With Kirby:
Hulk
The Incredible Hulk #1 (May, 1962)
With Kirby:
Betty Ross
The Incredible Hulk #1 (May, 1962)
With Kirby:
General "Thunderbolt" Ross
The Incredible Hulk #1 (May, 1962)
With Kirby:
Rick Jones
The Incredible Hulk #1 (May, 1962)
With Kirby:
Doctor Doom
Fantastic Four #5 (July, 1962)
With writer/artist Steve Ditko:
Spider-Man
Amazing Fantasy #15 (August, 1962)
With Ditko:
Aunt May
Amazing Fantasy #15 (August, 1962)
With Ditko:
Uncle Ben
Amazing Fantasy #15 (August, 1962)
With Ditko:
Eugene "Flash" Thompson
Amazing Fantasy #15 (August, 1962)
With writer Lieber and artist Kirby:
Thor
Journey into Mystery #83 (August, 1962)
With writer Lieber and artist Kirby:
"Stone Men from Saturn" (which would later be revealed as Kronans, and specifically Korg)
Journey into Mystery #83 (August, 1962)
With writer Lieber and artist Kirby:
Ant-Man
Tales to Astonish #35 (September, 1962)
With writer Lieber and artist Kirby:
Jane Foster
Journey into Mystery #84 (September, 1962)
With writer Lieber and artist Kirby:
Loki
Journey into Mystery #85 (October, 1962)
With writer Lieber and artist Kirby:
Heimdall
Journey into Mystery #85 (October, 1962)
With writer Lieber and artist Kirby:
Odin
Journey into Mystery #86 (November, 1962)
With Kirby:
Alicia Masters
Fantastic Four #8 (November, 1962)
With Kirby:
Willie Lumpkin
Fantastic Four #11 (February, 1963)
With writer Lieber and artist Don Heck:
Iron Man
Tales of Suspense #39 (March, 1963)
With writer Lieber and artist Don Heck:
Ho Yinsen
Tales of Suspense #39 (March, 1963)
With writer/artist Ditko:
J. Jonah Jameson
The Amazing Spider-Man #1 (March, 1963)
With writer/artist Ditko:
John Jameson
The Amazing Spider-Man #1 (March, 1963)
With Kirby (and Ditko inking):
Uatu the Watcher.
Fantastic Four #13 (April, 1963)
With Kirby:
Nick Fury
Sgt. Fury and his Howling Commandos #1 (May, 1963)
With Kirby:
The Howling Commandos
Sgt. Fury and his Howling Commandos #1 (May, 1963)
With Kirby:
"Dum Dum" Dugan
Sgt. Fury and his Howling Commandos #1 (May, 1963)
With Kirby:
Gabe Jones
Sgt. Fury and his Howling Commandos #1 (May, 1963)
With writer/artist Ditko:
The Vulture
The Amazing Spider-Man #2 (May, 1963)
With writer/artist Ditko:
The Tinkerer
The Amazing Spider-Man #2 (May, 1963)
With writer Robert Bernstein and artist Joe Sinnott:
Frigga
Journey into Mystery #92 (May, 1963)
With writer H.E. Huntley and artist Kirby:
The Wasp
Tales to Astonish #44 (June, 1963)
With writer/artist Ditko:
Doctor Octopus
The Amazing Spider-Man #3 (July, 1963)
With artist Ditko:
Doctor Strange
Strange Tales #110 (July, 1963)
With artist Ditko:
Ancient One
Strange Tales #110 (July, 1963)
With artist Ditko:
Wong
Strange Tales #110 (July, 1963)
With artist Ditko:
Baron Mordo
Strange Tales #111 (August, 1963)
With Kirby:
The Avengers
The Avengers #1 (September, 1963)
With writer/artist Ditko:
The Sandman
The Amazing Spider-Man #4 (September, 1963)
With Kirby:
The X-Men
X-Men #1 (September, 1963)
With Kirby:
Magneto
X-Men #1 (September, 1963)
With Kirby:
Professor X
X-Men #1 (September, 1963)
With Kirby:
Cyclops
X-Men #1 (September, 1963)
With Kirby:
Jean Grey
X-Men #1 (September, 1963)
With Kirby:
Beast
X-Men #1 (September, 1963)
With Kirby:
Iceman
X-Men #1 (September, 1963)
With Kirby:
Angel
X-Men #1 (September, 1963)
With writer Bernstein and artist Heck:
Pepper Potts
Tales of Suspense #45 (September, 1963)
With writer Bernstein and artist Heck:
"Happy" Hogan
Tales of Suspense #45 (September, 1963)
With writer/artist Ditko:
Liz Allen
The Amazing Spider-Man #4 (September, 1963)
With writer/artist Ditko:
Betty Brant
The Amazing Spider-Man #4 (September, 1963)
With Kirby:
Giant-Man
Tales to Astonish #49 (November, 1963)
With Kirby:
The Vanisher
The X-Men #2 (November, 1963)
With writer/artist Ditko:
The Lizard
The Amazing Spider-Man #6 (November, 1963)
With Kirby:
Surtur
Journey into Mystery #97 (a month earlier, in October, 1963)
With artist Heck:
Mister Hyde
Journey into Mystery #99 (December, 1963)
With Kirby:
The Blob
X-Men #3 (January, 1964)
With Kirby:
Baron Strucker
Sgt. Fury and his Howling Commandos #5 (January, 1964)
With Ditko:
Electro
The Amazing Spider-Man #9 (February, 1964)
With Heck:
The Mandarin
Tales of Suspense #50 (February, 1964)
With Kirby, who co-created the character along with Joe Simon in 1941:
Bringing Captain America into the modern era and making him a "man out of time", which endures to this day
Avengers #4 (March, 1964)
With Kirby:
The Brotherhood of Mutants
X-Men #4 (March, 1964)
With Kirby:
Scarlet Witch
X-Men #4 (March, 1964)
With Kirby:
Quicksilver
X-Men #4 (March, 1964)
With Kirby:
Toad
X-Men #4 (March, 1964)
With Kirby:
Mastermind
X-Men #4 (March, 1964)
With Kirby:
Hela
Journey into Mystery #102 (March, 1964)
With Kirby:
Sif
Journey into Mystery #102 (March, 1964)
With artist Bill Everett:
Daredevil
Daredevil #1 (April, 1964)
With Everett:
"Foggy" Nelson
Daredevil #1 (April, 1964)
With Everett:
Karen Page
Daredevil #1 (April, 1964)
With writer N. Korok (Don Rico) and artist Don Heck:
Black Widow
Tales of Suspense #52 (April, 1964)
With Kirby:
Skurge, the Executioner
Journey into Mystery #103 (April, 1964)
With Ditko:
Mysterio
The Amazing Spider-Man #13 (June, 1964)
With Ditko:
The Green Goblin
The Amazing Spider-Man #14 (July, 1964)
With Kirby:
Baron Zemo, (father of Helmut Zemo)
The Avengers #6 (July, 1964)
With Ditko:
Kraven the Hunter
The Amazing Spider-Man #15 (August, 1964)
With artist Joe Orlando:
The Owl
Daredevil #3 (August, 1964)
With artist Don Heck:
Hawkeye
Tales of Suspense #57 (September, 1964)
With Kirby:
Kang the Conqueror
The Avengers #8 (September, 1964)
With artist Joe Orlando:
The Purple Man
Daredevil #4 (October, 1964)
With writer/artist Ditko:
The Sinister Six
The Amazing Spider-Man Annual #1 (October, 1964)
With artist Don Heck:
Wonder Man
The Avengers #9 (October, 1964)
With Ditko:
Dormammu
Strange Tales #126 (November, 1964)
With Ditko:
Glenn Talbot
Tales to Astonish #61 (November, 1964)
With Kirby:
Edwin Jarvis
Tales of Suspense #59 (November, 1964)
With Ditko:
Ned Leeds
The Amazing Spider-Man #18 (November, 1964)
With Ditko:
Mac Gargan
The Amazing Spider-Man #19 (December, 1964)
With Ditko:
The Leader
Tales to Astonish #62 (December, 1964)
With Ditko:
The Mindless Ones
Strange Tales #127 (December, 1964)
With Kirby:
Laufey
Journey into Mystery #112 (January, 1965)
With Kirby:
The Absorbing Man
Journey into Mystery #114 (March, 1965)
With Kirby:
Fenris
Journey into Mystery #114 (March, 1965)
With Ditko:
Kaecilius
Strange Tales #130 (March, 1965)
With Kirby:
Creating a new version of the Golden Age Timely (Marvel) Comics adaptation of the classic pulp character Ka-Zar
The X-Men #10 (March, 1965)
With Kirby:
Medusa
The Fantastic Four #36 (March, 1965)
With artists Jack Kirby and Alex Toth:
The Juggernaut
The X-Men #12 (July, 1965)
With Kirby:
The Warriors Three
Journey into Mystery #119 (August, 1965)
With Kirby:
Fandral
Journey into Mystery #119 (August, 1965)
With Kirby:
Hogun
Journey into Mystery #119 (August, 1965)
With Kirby:
Volstagg
Journey into Mystery #119 (August, 1965)
With Kirby:
Hercules' first modern appearance
Journey into Mystery Annual #1 (October, 1965)
With artists Jack Kirby and Jay Gavin (Werner Roth):
The Sentinels
The X-Men #14 (November, 1965)
With artists Jack Kirby and Jay Gavin (Werner Roth):
Bolivar Trask
The X-Men #14 (November, 1965)
With Ditko:
Gwen Stacy
The Amazing Spider-Man #31 (December, 1965)
With Kirby:
Black Bolt and the Inhumans
The Fantastic Four #45 (December, 1965)
With Ditko:
Harry Osborn
The Amazing Spider-Man #31 (December, 1965)
With artist Dick Ayers:
Eric Koenig
Sgt. Fury and his Howling Commandos #27 (February, 1966)
With Kirby:
The Silver Surfer
The Fantastic Four #48 (March, 1966)
With Kirby:
Galactus
The Fantastic Four #48 (March, 1966)
With artists Jack Kirby and Dick Ayers:
Sharon Carter
Tales of Suspense #75 (March, 1966)
With artists Jack Kirby and Dick Ayers:
Batroc the Leaper
Tales of Suspense #75 (March, 1966)
With artists Jack Kirby and John Romita:
Peggy Carter
Tales of Suspense #77 (May, 1966)
With artist Howard Purcell:
Jasper Sitwell
Strange Tales #144 (May, 1966)
With artist Don Heck:
The Collector
The Avengers #28 (May, 1966)
With Ditko:
Mendel Stromm
The Amazing Spider-Man #37 (June, 1966)
With Kirby:
The Black Panther
The Fantastic Four #52 (July, 1966)
With writer Denny O'Neil and artist John Romita:
Gladiator
Daredevil #18 (July, 1966)
With Kirby:
T'Chaka
Fantastic Four #53 (July, 1966)
With Kirby:
Ulysses Klaw
Fantastic Four #53 (July, 1966)
With artist Don Heck:
Bill Foster
The Avengers #32 (September, 1966)
With Kirby:
Ego the Living Planet
Thor #133 (October, 1966)
With artist John Romita:
The Rhino
The Amazing Spider-Man #41 (October, 1966)
With Romita:
Mary Jane Watson
The Amazing Spider-Man #42 (November, 1966)
With Romita:
The Shocker
The Amazing Spider-Man #46 (March, 1967)
With artist Gil Kane:
The Abomination
Tales to Astonish #90 (April, 1967)
With Romita:
The Kingpin
The Amazing Spider-Man #50 (July, 1967)
With Kirby:
Ronan the Accuser and the Kree
The Fantastic Four #65 (August, 1967)
With Romita:
Joe "Robbie" Robertson
The Amazing Spider-Man #51 (August, 1967)
With Kirby:
MODOK
Tales of Suspense #94 (October, 1967)
With artist Gene Colan:
Captain Marvel, (Mar-Vell, the male Captain Marvel)
Marvel Super-Heroes #12 (December, 1967)
With Romita:
Captain George Stacy
The Amazing Spider-Man #56 (January, 1968)
With Kirby:
The Wrecker
Thor #148 (January, 1968)
With artist Gene Colan:
Whiplash
Tales of Suspense #97 (January, 1968)
With artist Larry Lieber:
Richard and Mary Parker
The Amazing Spider-Man Annual #5 (November, 1968)
With Kirby:
Doctor Faustus
Captain America #107 (November, 1968)
With Kirby:
Franklin Richards
The Fantastic Four Annual #6 (November, 1968)
With artist John Buscema:
Mephisto
The Silver Surfer #3 (December, 1968)
With Romita:
Randy Robertson
The Amazing Spider-Man #67 (December, 1968)
With artist Gene Colan:
The Guardians of the Galaxy (the original lineup)
Marvel Super-Heroes #18 (January, 1969)
With artist Gene Colan:
Yondu
Marvel Super-Heroes #18 (January, 1969)
With Romita:
Vanessa Fisk
The Amazing Spider-Man #70 (March, 1969)
With artist Gene Colan:
The Falcon (and Redwing)
Captain America #117 (September, 1969)
With artist John Buscema:
The Prowler (Hobie Brown)
The Amazing Spider-Man #78 (November, 1969)
With artist John Buscema:
She-Hulk
The Savage She-Hulk #1 (February, 1980)
And I'm done! To clarify: this isn't every character Stan co-created, there are COUNTLESS more supporting characters, heroes, and villains that his teams developed for their stories. Like me, I hope you're thankful you got to live in the era of Stan Lee. Bye for now! EXCELSIOR!