Also a favorite is: Colorado Territory with McCrea and Virginia Mayo. Late 40s'. Great ending.

Pale Rider is one of my favorites with Eastwood. Although many of his are very similar.

Warlock with Fonda, Quinn, Widmark another favorite.

Tin Star.

Way West.

Last Train from Gun Hill.

High Noon.

Westerner-1940, score by Tiomkin and Newman.

Red River-John Wayne, Montgomery Clift-Great Tiomkin score.

Those are a few of my favorites. What are yours? Best, John.

EXTREME PREJUDICE is a western, I think. Its director Walter Hill also made the estimable THE LONG RIDERS, GERONIMO and the simply amazing WILD BILL.

Fritz Lang's RANCHO NOTORIOUS with Marlene Dietrich is bizarre and hilarious.

Samuel Fuller's 40 GUNS. (Remember the theme song?)

WESTWORLD? I haven't seen it in twenty years, but remember liking it, although I was a kid then, and have since grown a healthy dislike for Michael Crichton.

That'll do to start ...

Others that I’ve enjoyed are Silverado, Tombstone, Lonely Are The
Brave (modern western), The Professionals, Quigley Down Under,
Purgatory, True Grit, The Cowboys, The Big Country, Dances With
Wolves, How the West Was Won, The Searchers, and
the naturalism of all the Sergio Leone spaghetti westerns. I’m
sure I’ll think of others.

Duh, I guess you wanted underrated instead of favorites. Guess I need to learn to read; maybe some of these haven't achieved enough status.

And how about the recent TNT film "The Virgian," with Bill Pullman and Diane Lane? Another great western. A little slow-moving, but still entertaining.