You're so right...and one actress who was positively evil was Bette Davis. It's amazing her reputation has withstood all the absolutely horrible things she did in her personal life. You have to be one incredibly talented person for your legacy to remain intact after having the kinds of revelations as she has had.
Bette Davis was a very complex person; part good, part not so good.But she was one of THE greats, when it comes to acting.