Unforgiven/WMG

Will Munny is The Man With No Name
.
 * That seems unlikely given that The Good, the Bad and the Ugly takes place in the American Civil War and Unforgiven takes place around Abraham Lincoln's assassination. It would require Munny to have aged twenty-six years in about three years.
 * Unforgiven takes place in 1881. That's 16 years after Lincoln was shot, and about 19 after The Good, the Bad and the Ugly.
 * Just to clarify, Unforgiven takes place shortly after the shooting of president Garfield, not Lincoln.