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A
Amazing Fantasy #15 (first appearance of Spider-Man)
Amazing Spider-Man #1 (first Spider-Man series)
Amazing Spider-Man #40 ("end" of Green Goblin)
Amazing Spider-Man #50 (first appearance of Kingpin)
Amazing Spider-Man #121 (death of Gwen Stacy)
Amazing Spider-Man #129 (first appearance of Punisher)
Amazing Spider-Man #238 (first appearance of Hobgoblin)
Amazing Spider-Man #252 (first black costume in ASM)
Amazing Spider-Man #298 (first Todd McFarlane)
Amazing Spider-Man #300 (first full appearance of Venom)
Avengers #1 (first appearance of The Avengers)
Avengers #4 (first Silver Age Captain America)
Avengers #57 (first Silver Age appearance of The Vision)

C
Captain America #100 (first Captain America title)

D
Daredevil #1 (first appearance of Daredevil)
Daredevil #131 (first appearance of Bullseye)
Daredevil #168 (first appearance of Elektra)

F
Fantastic Four #1 (first Fantastic Four)
Fantastic Four #48 (first appearance of Galactus, Silver Surfer)

G
Ghost Rider #1 (start of Bronze Age Ghost Rider series)
Giant-Size X-Men #1 (new X-Men team)

I
Incredible Hulk #1 (first appearance of Hulk)
Incredible Hulk #181 (first appearance of Wolverine)
Iron Fist #14 (first appearance of Sabretooth)
Iron Man #1 (first solo Iron Man series)
Iron Man #55 (first appearance of Thanos)

J
Journey Into Mystery #83 (first appearance of Thor)

L
Luke Cage #1 (first appearance of Luke Cage)

M
Marvel Spotlight #5 (first appearance of Ghost Rider)

N
New Mutants #87 (first appearance of Cable)
New Mutants #98 (first appearance of Deadpool)

P
Punisher Limited Series #1 (first Punisher series)

S
Secret Wars #8 (origin of black costume/symbiote)
Silver Surfer #1 (origin of Silver Surfer revealed)
Spectacular Spider-Man #1 (first Spectacular Spider-Man)

T
Tales of Suspense #39 (first appearance of Iron Man)
Thor #337 (first appearance of Beta Ray Bill)

U
Uncanny X-Men #121 (first appearance of Alpha Flight)
Uncanny X-Men #129 (first appearance of Kitty Pride, Emma Frost)
Uncanny X-Men #266 (first appearance of Gambit)

W
Wolverine Limited Series #1 (first solo Wolverine series)
Wolverine Vol 2 #1 (second solo Wolverine series)

X
X-Factor #1 (first appearance of X-Factor)
X-Men #1 (X-Men debut, first appearance of Magneto)
X-Men #94 ("All-New, All-Different" X-Men)
X-Men #101 (first appearance of Phoenix)