Sir Alec Guinness: Obi-Wan (died Aug. 5, 2000 -- Ironically on one of my good Star Wars friend's birthdate)
Sebasian Shaw: Anakin Skywalker (died Dec. 23, 1994)
Phil Brown: Uncle Owen (died Feb. 9, 2006)
Peter Cushing: Moff Tarkin (died Aug. 11, 1994 -- Ironically on by birthdate, and even more ironic is that Ian McDirmed was born that same date too)
Shelagh Fraser: Aunt Beru (died Sept. 13, 2000)
Jack Purvis: Head Jawa (died Nov. 1997)
William Hootkins: Porkins (died Oct. 23, 2005)
John Hollis: Lobot (died Oct. 18, 2005)
Michael Sheard: Admrl. Ozzel (died Aug. 31, 2005)
Bruce Boa: General Rieekan (died Apr. 17, 2004)
Alex McCrindle: General Donna (died Apr. 20, 1990)
Eddie Byrne: General Willard (died Aug. 21, 1981)
Des Webb: Wampa (died May 21, 2002)
Some of these people, I don't even remember who they played. I'm just quoting names at this point. It's like a body count of people I don't even know.
I swear to God I will be inconsolable the days when Mark Hamill, Harrison Ford, and Carrie Fisher all head off towards that Jedi Temple in the sky. But they are still fairly young though. God forbid anything happen to them...