Salvatore Valestra
Salvatore "Sal" Valestra is the overarching antagonist of Batman: Mask of the Phantasm, the first animated film based on Batman: The Animated Series.
He is a mob boss who ruled Gotham City with an iron fist before Bruce Wayne took the mantle of Batman. Due to ordering the Joker to murder Carl Beaumont, Valestra isn't only indirectly responsible for creating Batman, but also of the Phantasm's creation.
He was voiced by the late Abe Vigoda, who also played Salvatore Tessio in The Godfather.