|Hud (1963) [Homer Bannon]: Fatally injured (on top of old age and general ill health) after falling from his horse (off-screen); he dies shortly after Paul Newman and Brandon De Wilde discover him in the road. (Thanks to Joe)
Being There (Chance) (1979) [Benjamin Turnbull Rand]: Reportedly dies of old age/natural causes. (Thanks to Joe)
Ghost Story (1981) [Dr. John Jaffrey]: Dies of a heart attack in his pharmacy after being frightened by Alice Krige's ghost.