Gunfighter, The (1950): Henry King’s Adult Psychological Western, Starring Gregory Peck (Role Rejected by John Wayne)

Considered to be one of the first mature ("psychological") Westerns in the post-WWII era, Henry Koster's The Gunfighter features Gregory Peck in top form, as an aging, over the hill gunslinger, who wants to lay down his gun but may be doomed.