Dale Van Sickel (1907 - 1977)
(Note: As a professional stunt performer, Dale probably "died" in place of other actors, though I don't know any specific examples. Additionally, he probably died in several more of his generic "Thug" and "Henchman" bit parts, though the below films are the only ones I know definitely.)
- Mr. and Mrs. North (1942) [Corpse of Stanley Brent]: Killed (off-screen) by Stuart Crawford; his body is shown afterwards when Gracie Allen opens the closet door and Dale falls out.
- G-Men vs. The Black Dragon [Ch. 3, Arsenal of Doom] (1943) [Pier Thug]: Stabbed in the back when shoved against the spiked end of a fire axe that was lodged in a beam during a fight with Roland Got.
- Haunted Harbor [Ch. 12, Fire Trap] (1944) [Gold Theft Thug]: Fatally shot in the back by Bud Geary as Bud was trying to kill Kane Richmond.
- Secret Agent X-9 [Ch. 4, Floodlight Murder] (1945) [Truck Driver]: Killed when he jumps from a speeding delivery truck during a fight with Lloyd Bridges. His body is not shown but we learn of his death when Keye Luke informs Lloyd.
- He Ran All the Way (1951) [Officer Newcomb]: Shot in the chest in a shootout with John Garfield: he dies of his wound offscreen and his death is reported in a newspaper headline.
- Storm Warning (1951) [Walter Adams]: Beaten to death by Steve Cochran during a lynching.
- Earth vs. the Flying Saucers (1956) [Man Crushed Beneath Wall]: Crushed to death by falling rubble during the alien invasion.
- Thunder Road (1958) [Mike Williams, Treasury Agent]: Killed in a car crash/explosion, along with Mitch Ryan.
- Cyborg 2087 (1966) [Tracer #1]: Killed in a struggle with Michael Rennie; his body later vanishes when the timeline is altered. (Thanks to Dignan)
- Johnny Reno (1966) [Ab Conners]: Shot to death in a shoot-out with Dana Andrews.
- Murderer's Row (1966) [Fortress Guard]: Shot in the chest by Dean Martin using his '10 second delay' gun. (Thanks to Brian)
- Tate: A Lethal Pride (1960) [Jimson]: Shot by Gregory Morton when he opens fire to kill Ted de Corsia and Ronald Nicholas. (Thanks to Brian)
- Peter Gunn: Cry Love, Cry Murder (1961) [Frankie Cole]: Shot in the chest in a shoot-out with Craig Stevens in a garage.
- Perry Mason: The Case of the Silent Six (1965) [Joe Oliver]: Shot to death by David Macklin in Chris Noel's apartment. (Thanks to Dignan)