I will go with these.
The Searchers - The Duke is nasty and out of character in this one.
Winchester 73 - Jimmy Stewert is a great western actor
The Sackets - Good movie, and Glenn Ford was another great western actor.
Silverado - Others have said plenty. Good flick
Quigley Down Under - I continue to watch it
As a sixth, 3:10 to Yuma, either of them
actually there are plenty of others. Some of the old Randolf Scott movies are gerat also, and even Sean Connery in a Louis L'Amour movie was good.