A few more that I thought were worth noting:
The Big Country,,, Gregory Peck, Charleton Heston, Burl Ives and many more,
Monte Walsh,,,, Lee Marvin and Jack Palance,
New Riders of the Purple Sage,,, Ed Harris did an excellent portrayal of Lassiter in my opinion.
And the movie that most likely inspired the Magnificent Seven, the Japanese film Seven Samurai,,, kimonos instead of cowboy hats, katanas for colts,, a great flick.