Categorizing Villains. Who's A-list? Who's B-list?

[Tuck]

by that logic I think guys like Hammerhead and Tombstone, who would probably C-Listers compared to that ranking, are cult favorite enough to warrant being B-Listers.

Well, Tombstone is the main villain in the Spectacular animated series. Make of that what you will.

D-List: [...] Screwball,

Hey, I like Screwball.