I know Count Francesco Cenci isn't on this list, but he should be. I need to think long and hard before thinking about a fictional father who's worse than him.

Rorge, from ASOIAF

He found an orphan boy, filed his teeth down and forced him to fight dogs, driving him into insanity and cannibalism and delusions of dog-hood.

Aside from Vangelis it's honestly a toss up