I wouldn't mind knowing what folks consider the 1st of a genre is. And if there is debate, all the better.
1st Comic:Famous Funnies 1 (?) 1933
1st Superhero: Action 1 1938
1st female lead character?: Wonder Woman in All Star 8?
1st Horror: Eerie 1 (?) 1947
1st Western: Crackajack Funnies #9 (?) 1939 - 1st cover and app of Red Ryder? or is it Hi Yo Silver w Lone Ranger? or something else.
1st Sci Fi: Strange Adventures 1? I doubt it, isn't one of the LB Cole classics earlier than 1950?
1st Cheesecake? (what's the first real headlights, or female suggestive cover? Phantom Lady? Junior?, a Fiction House?)
1st Romance: Venus 1 (?)
1st or earliest classic gruesome cover? Bullet hole in the head, acid to face etc.
And any other of the major categories that folks collect.
1st Paratrooper cover: Action 2?
A couple others that aren't as collected as they once were.
1st photo cover:
1st TV comic:
1st Funny Animal cover/story: Is it still Famous Funnies 1.
1st WWII cover? - this might be tough to nail down
1st Hitler cover?
Here's a few other oddballs that might be fun to search for.
1st Motorcycle cover
1st Statue of Liberty cover
1st cover with a television on it
1st cover with Vampire (or Dracula), Werewolf, Mummy, Frankenstein (Classics?) Zombie, Alien