Heroes need villains to fight. Superheroes need a rotating cast of villains to fight each month.
Overall,which crimefighter has the greatest amount of compelling enemies?

These are all good choices. I went for Spider-Man, but I could argue for any of them.

I would say Batman, followed by The Flash.

Batman.

Dick Tracy. Most of Batman's early Rogues were inspired by Dick Tracy.

Second vote for Dick Tracy.

Dick Tracy was my second choice. Batman's early rogues were inspired by Tracy's, but they were better. And he has another 70-some years of additional rogues, quite a few of which are inspired (and quite a few of which were not! Cluemaster?!?).
Anyway, I like Batman's foes.

I have three categories I wish to award:

Best overall rogue's gallery: Spider-Man (just an incredible strafing run of villains in those first 20 or so issues)

Best ratio of quality of rogue's gallery to signficance of hero: The Flash (he punches way above his weight class when it comes to rogue's gallery).

Best single arch nemisis: Batman with the Joker. (Never has then been a more perfect, archetypical paring).

Flash was my first favorite super hero, so I am biased towards his nemeses.

#1 Seed Villian

Batman : Joker
FF : Dr. Doom
Flash : Reverse Flash? Captain Cold?
Spiderman : Doc Oc? Green Goblin?
Dick Tracy : no clue

Thoughts?

Dick Tracy: Flattop Jones Sr. then probably The Brow, Pruneface, and The Mole.

I went with Batman; as much as I enjoyed Flash's Rogues gallery as a kid, their driving motivations were all the same; the rogues are thieves. pure and simple. So there's all sorts of capers and plots, and robberies to foil, but there's not much depth to them.

Batman, OTOH, basically has every mental disorder personified as a villain; and travel in every direction - the brute force of a Bane or Killer Croc, the mental challenge of the Riddler or Calendar Man; the sheer chaos of the Joker. Base thieves like Catwoman / Penguin, and world changing crusaders like Poison Ivy. Even would be dictators like R'as. Batman's gallery covers it all.


Silver Age Flash's was Captain Cold; modern Flash is definitely Zoom / Thawne. DC so often used the mirror villain trope though, that I got tired of it. Not that there haven't been great takes on it (Sinestro, Bizzaro), but for the most part, I prefer different takes on the road not taken. (R'as Al Ghul versus Bruce Wayne)

Others for your list though:
Superman: Luthor
Wonder Woman: Cheetah
Green Lantern: Sinestro
Atom: Clock King
Hawkman: Kanjar Ro
X-Men: Magneto
Wolverine: Sabertooth
Avengers: Ultron
Spiderman - J. Jonah Jameson
Hulk: Abomination
Thor: Loki
Captain America: Red Skull
Iron Man: Tony Stark
Daredevil: Kingpin

Final thought - heroes are defined by the quality of their villains; so many B tier heroes don't have a great (or any) rogues gallery to speak of. But the ones we think of as the greats? All easily have a 1/2 dozen villains we look forward to seeing

I voted for Hulk ("Other"). When I was reading the Hulk as a kid, his "rogues gallery" was the entire Marvel Universe.

Challenge! I'd put The Leader as Hulk's arch-nemesis. (Or "archie," as I like to call it in order to save a few keystrokes. Even though it means they all end up being drawn in the same house-style.)

Fantastic Four
Spider-Man
X-Men
Batman
New Gods
Savage Dragon

You would love Venture Bros. In that show, the villains call it "arching" when they match up with a good guy. As in, "I'm arching on him, you arch on that other one."

I don't know how that show so completely passed me by. It does sound like my type of thang.

I did think about going that way, but ultimately, I thought the mirror villain works better with the Hulk, because it is the humanity of the man inside the monster that makes the difference. With the Leader, it's more about the loss of what could have been with him, and less about the morality that the hulk has retained. ymmv

If only someone you knew had all the deeveedees . . . .

Dick Tracy was my first experience with a rouges' gallery. I loved the puns.

I wish they were available on a streaming service! Physical media is for tha burdz.

Hulu and HBO max