Same here. The both of them were really good actors.Phillip Seymore Hoffman and Heath Ledger
Hoffman was a total surprise, considering apparently he had a role in Hunger Games that would carry forward to the final two movies and I didn't know he was ill. Also, while I thought Capote was boring, Hoffman was great in that movie.
As for Ledger, man was his star on the rise. Yeah you had Dark Knight (Which I still think Killed him more than the Drugs did), but one of the more quirky movies that I liked was A Knight's Tale, and he was a co-star for Brokeback Mountain. I wonder what he could have become had he still been alive and how many more awards he could have won. It's a missed opportunity that we couldn't continue to see him grow and develop as an actor, especially after his amazing performance as The Joker.
Raymond Burr. Yea he was in his 70's, but he was a very good actor (and he was funny as hell


Peter Boyle. Man was he talented (and really funny), still miss him

Peter Falk. Ruled as Columbo and was one heck of an artist.