There’s so many to choose from: I love Rio Bravo - Howard Hawk’s answer to High Noon. Great performances by all involved including the pretty song My Rifle, My Pony and Me.
I feel like watching True Grit again.
And don’t forget that incredible one, The Quiet Man, with the incredible Maureen O’hara. Hilarious, touching, dramatic and thought provoking through and through.
Speaking of Rio Bravo have you noticed how often the Duke’s movies had pop singers as semi-major characters: Ricky Nelson, Fabian, Glen Campbell? Roles later frequently played by one of his sons.