Darth Vader in terms of film...
But in literature - ah, now that's the challenge - to create an antagonist who is believably real and not vaudevillian melodrama. In which case, I'd have to consider Raistlin from Dragonlance a great villain for his entirely self-centered motivation and betrayal.
But in literature - ah, now that's the challenge - to create an antagonist who is believably real and not vaudevillian melodrama. In which case, I'd have to consider Raistlin from Dragonlance a great villain for his entirely self-centered motivation and betrayal.