Clint Eastwood in The Good, The Bad, and the Ugly, Paul Newman and Robert Redford in Butch Cassidy and the Sundance Kid, and Harrison Ford and Daniel Craig in Cowboys and Aliens: Love the vests, cuffed sleeves, and low-slung, double belts.
Antonio Banderas in Desperado: Spanish influences are apparent in lots of cowboy movies. The red, wound-obstructing bandana on one arm is a cool idea.
Steve McQueen in Magnificent Seven and John Wayne in Hondo: Scarves, bandanas, and neckties.
Antonio Banderas, Anthony Hopkins, and Stuart Wilson in The Mask of Zorro: You could look at each of these outfits for hours and not find all the hidden gems of texture, pattern, color, layering, piping, and creatively tied scarves entrenched in each.
(photos collected from Google Images)