Sam Rockwell as The Joker. As great as Ledger's reimagining was, I'd like to see the Clown Prince of Crime return instead of crazy hobo clown terrorist. Rockwell is one of the best actors working, and one of his strongest traits is how he balances humor with being legitimately threatening. Seven Psychopaths. Green Mile. Confessions of a Dangerous Mind. The only good part of The Sitter. He's really good at having that spontaneous Robin Williams/Bill Murray humor and allowing that spontaneity to become scary.