5. Gorilla Grodd (The Flash)
Batman has the Joker, Superman has Lex Luthor, and the Flash has Gorilla Grodd. The product of a time when the appearance of gorillas in comics equated to positive sales, Grodd is like Hannibal Lector: A villain whose intellect and eloquence belies his savagery. Working alone or with the Secret Society of Super Villains, Grodd’s ambitions are always centered around conquest.