|Billy the Kid (1941) [Billy 'The Kid' Bonney]: Shot to death in a shoot-out with Brian Donlevy. (Thanks to Brian)
Undercurrent (1946) [Alan Garroway]: Trampled to death by a horse just as Robert is about to kill Katharine Hepburn with a rock. (Thanks to Tracey)
Ride, Vaquero! (1953) [Rio]: Shot to death in a shoot-out with Anthony Quinn. (Thanks to Jeff)
Savage Pampas (1966) [Captain Martin]: Fatally injured (I couldn't tell precisely how) during a fight with Ron Randell in the desert, he dies shortly after managing to kill Ron.