Category A:
Bertha Mason from Jane Eyre (and no, not because of Wide Sargasso Sea)
Lord Henry from Dorian Gray
Oedipus
Leontes from Winter's Tale (though he's arguably not a villain?)
Grendel
Category B:
Moriarty
Abigail Williams from the Crucible. I really really hate her.
Lorenzo from the Spanish Tragedy
Hmmm, I can't decide where Heathcliff goes. A year ago, I would've put him in Category A, but more recently I've had less and less sympathy for him.

