|The Outer Limits: The Zanti Misfits (1963) [Ben Garth]: Killed by the alien Zanti leader after he falls into a crevice; his body is shown afterwards when Olive Deering discovers him. (Thanks to Stephen)
Hush...Hush, Sweet Charlotte (Cross of Iron; What Ever Happened to Cousin Charlotte?) (1964) [John Mayhew]: Decapitated with a meat-cleaver (off-camera) by the younger version of Mary Astor, after first having his hand chopped off. (Note: Mary only appears in the 1960s sequences; the younger version of her character is never seen on-camera during the 1920s prologue.) (Thanks to Mac and Stephen)
Marnie (1964) [Sailor]: Beaten to death with a fireplace poker by Melody Thomas Scott, while Bruce is attacking Louise Latham. Shown in a flashback when Tippi Hedren finally remembers her long-repressed childhood trauma.
The Wild Angels (1966) [Loser]: Fatally wounded during a fight with a rival gang; he dies of his injuries after his fellow gang members "rescue" him from the hospital. (I haven't seen this movie myself, but got the information from The Psychotronic Encyclopedia of Film.)
The St. Valentine's Day Massacre (1967) [May]: Machine-gunned, along with the rest of Ralph Meeker's gang, in a garage. (Thanks to Mac, Sammy, and Stephen)
Hang 'Em High (1968) [Miller]: Hanged by Clint Eastwood. (Thanks to Patrick)
Bloody Mama (1970) [Kevin Dirkman]: Machine-gunned across the back by Shelley Winters when he tries to surrender to the police. (Thanks to Stephen)
The Cowboys (1972) [Asa 'Long Hair' Watts]: Dragged to his death after his leg gets tangled in his horse's reins, and A Martinez fires a shot to send the horse running. (Thanks to Stephen)
The King of Marvin Gardens (1972) [Jason Staebler]: Shot to death by Ellen Burstyn. (Thanks to Mac)
Silent Running (1972) [Freeman Lowell]: Commits suicide by blowing up the ship, after sending the final forest module out into space. (Thanks to George)
Black Sunday (1977) [Captain Michael J. Lander]: Machine-gunned by Robert Shaw when Robert's helicopter pulls alongside the hijacked Goodyear Blimp (after Robert first shoots Marthe Keller); he dies shortly after igniting the fuse to blow up the blimp.
Coming Home (1978) [Captain Bob Hyde]: Commits suicide by drowning himself in the ocean; we only see him walking into the sea at the end of the movie. (It could be interpreted that he's simply leaving his old life behind him, but the implication of suicide is very strong.) (Nudity alert: Rear)
Tattoo (1981) [Karl Kinsky]: Stabbed in the back with his own tattoo needle by Maud Adams while having sex with her. (Nudity alert: Rear)
Uncle Tom's Cabin (1987) [Augustine St. Claire]: Stabbed to death in a botched robbery after he leaves the tavern. (Thanks to Robert)
The Glass House (2001) [Begleiter]: Stabbed in the stomach by Gavin O'Connor, while Stellan Skarsgard tries to bargain with Gavin.