Today (Jan. 22) is the fourth anniversary of Heath Ledger's death and we can't let it pass without some sort of tribute. While he had several critically acclaimed roles, his Oscar-winning turn as The Joker in 2008's The Dark Knight will always be remembered as a triumph. It's not an overstatement to say his work in that film raised the standard for acting for an entire movie genre and it's one from which other actors will constantly draw inspiration. Controversy surrounded his death, but nothing can tarnish this jewel of a performance. Rest in Peace, Heath.