Here's one, watching it as I type "San Antonio" with Errol Flynn, overblown Hollywood, at its worst.
Thats a good question... it would have to be one with a lot of mellodrama, too much dialog, little action, and a big love interest. A sung title song by the "Sons of the Pioneers" would be a bonus.
I was rather thinking about some more evolute example from the 50's which retains some of the western blood but waters it down by sticking to some schlock Hollywood rules. Shane comes to mind. But probably there's something else.
Try "No Name On the Bullit" (1959) with Audie Murphy.
Why not show the American Western at its best, and then SL excelling such an example? I'd pair Vera Cruz with a Leone. Or is it the Italian way to fight only straw men?