|Terror Train (1980) [Doc Manley]: Decapitated (off-screen) by Derek McKinnon; the scene cuts away just as Derek raises a knife to Hart's throat. His body and severed head are shown afterwards when Ben Johnson and Jamie Lee Curtis discover him stuffed in an overhead compartment.
Die Hard (1988) [Harry Ellis]: Shot to death by either Alan Rickman or one of Alan's thugs. (My memory is vague as to who actually killed him.)
Batman: Mask of the Phantasm (1993; animated) [City Councilman Arthur Reeves]: Poisoned with the "Smilex" toxin by the Joker (voiced by Mark Hamill); we last see him laughing hysterically while talking to Batman (voiced by Kevin Conroy). (Thanks to Tommy)