|Oliver Reed (1938 - 1999)
Nephew of Carol Reed (director)
|The Curse of the Werewolf (The Curse of Siniestro; The Wolfman) (1961) [Leon Corledo]: Shot in the chest with a silver bullet by Clifford Evans, while Oliver is in his werewolf form.
The Crimson Blade (The Scarlet Blade) (1963) [Captain Tom Sylvester]: Stabbed to death in a swordfight with Lionel Jeffries.
Paranoiac (1963) [Simon Ashby]: Burned to death when he runs back into the burning building in his madness.
These Are the Damned (The Damned) (1963) [King]: Killed in a car crash when his car goes over a bridge.
The Brigand of Kandahar (1965) [Eli Khan]: Killed by Ronald Lewis (though I don't know the details).
The Shuttered Room (Blood Island) (1967) [Ethan]: Falls through a trapdoor in the mill after being attacked by Ann Bell. (Thanks to Dave)
Oliver! (1968) [Bill Sikes]: Shot in the chest by police while trying to escape by swinging across the street from a rope; his body is shown swinging back and forth from the rope afterwards. (Thanks to Katherine)
Women in Love (1969) [Gerald Crich]: Freezes to death after he wanders outside in the mountains.
The Devils (The Devils of Loudon) (1971) [Father Urbain Grandier]: Executed by being burned at the stake. (Thanks to Vandevere)
The Hunting Party (1971) [Frank Calder]: Shot in the chest by Gene Hackman after Gene catches up with Oliver and Candice Bergen in the desert. (Thanks to Eugene and G-Man)
Tommy (1975) [Frank Hobbs]: Stabbed in the back during the riot at the pinball camp; his body is shown again afterwards when Roger Daltrey places Ann-Margret's body beside him.
Venom (1982) [Dave Averconnelly]: Bitten on the leg by the black mamba after it crawls up his pants leg. (Thanks to Matt)
The House of Usher (The Fall of the House of Usher) (1988) [Roderick Usher]: Presumably killed, though I don't know the circumstances. (Based on the plot synopsis on the IMDB listing, this adaptation varies drastically from the original story, including eliminating the character of the sister who kills Usher, so I don't know what happens in this version.)
The Pit and the Pendulum (The Inquisitor) (1990) [Cardinal]: Suffocated after being entombed alive by Lance Henriksen's men.
Treasure Island (Devil's Treasure) (1990) [Captain Billy Bones]: Dies of a heart attack from fright, after being given the Black Spot by Christopher Lee. (I haven't seen this version, but I'm familiar with the story.)
Gladiator (2000) [Proximo]: Stabbed to death by Roman soldiers. (This scene was filmed after Oliver's real-life death; it was accomplished by using CGI to superimpose Oliver's face onto a stand-in as the soldiers close in on him. The original script called for Oliver to survive the movie and eulogize Russell Crowe at the end, but his death forced the filmmakers to rewrite his character's fate.) (Thanks to Matt)