Off the top of my head, all causes (including cancer, which is often a black swan event, but thats what Hooks died of so fair game I guess), and actors/actresses under 60 (Hooks was 57) I can think of (not including those who SNL regulars):
River Phoenix
Corey Haim
John Candy
Heath Ledger
Paul Walker
Chad Boseman
Michael Williams (Omar on the Wire)
Robert Chew (Prop Joe on the Wire)
Anne Heche
And thats just the actors, the music biz and artists would add alot more