Sam Shepard (1943 - 2017)
- Days of Heaven (1978) [The Farmer]: Stabbed to death with his own knife in a struggle with Richard Gere, after Sam attacks Richard. (Thanks to Mac)
- Raggedy Man (1981) [Bailey]: Fatally injured in a struggle with William Sanderson and Tracey Walter, after he catches them trying to rape Sissy Spacek. (I haven't seen this movie myself, but got the information from a plot synopsis.)
- The Pelican Brief (1993) [Professor Thomas Callahan]: Killed in an explosion by a car bomb as Julia Roberts watches in shock. (Thanks to Treece)
- Hamlet (2000) [Ghost]: Poisoned (off-screen) by Kyle MacLachlan; Sam appears as a ghost to his son (Ethan Hawke) throughout the movie.
- Swordfish (2001) [Senator James Reisman]: Shot in the chest by John Travolta while Sam is fishing in a stream.
- The Notebook (2004) [Frank Calhoun]: Dies (off-screen) of natural causes; we learn of his death in James Garner's narration, followed by a scene of Sam's funeral. (Thanks to Neil)
- Stealth (2005) [Captain George Cummings]: Commits suicide when Joe Morton comes to arrest him. (Thanks to Mathew)
- Killing Them Softly (2012) [Dillon]: Stabbed in the stomach; he dies (off-screen) of his wound some time afterwards. His death is confirmed when Brad Pitt informs Richard Jenkins. (Thanks to Tommy, Tim, and Matthew)
- August: Osage County (2013) [Beverly Weston]: Commits suicide (off-screen) by drowning himself in a lake. His death is confirmed when Will Coffey informs Julia Roberts and Ewan McGregor.
- Cold in July (2014) [Ben Russell]: Shot in the stomach with a shotgun by his son (Wyatt Russell), he manages to shoot him twice (first with a shotgun, then a pistol) in return before dying (with Michael C. Hall then burning down the building they're in).
- Ex-Mr. O-Lan Jones.