Well, Heathcliff says "as to repenting of my injustices, I've done no injustice, and I repent of nothing", so much for his redemption or remorse. Redemption requires judgement, so it finds no place in this marvelously neutral, non judgemental book.
The last lines of the book are among the most peaceful I've ever read, but it is the peace which comes from the complete removal of Heathcliff (and his offspring) from the scene by death, leaving Wuthering Heights and the Grange as if he'd never been. All his evil dies with him.