John Ford
1946

Now I see what all the fuss is about John Ford.
Probably the best studio-era Western I've seen.
(What's weird is that Open Range is practically a remake, only without that whole shootout at the OK Corral thing going for it.)
It has all the iconic cinematography and Henry Fonda and Victor Mature being all dissipated as Doc Holliday (who looks a lot like a 1940s version of Chris Noth).

(The only thing that really dates this is how it's totally racist (and sexist). Luckily, it's not a "fight the Indians" Western, so there's only the part where Wyatt Earp proves his strength and rightness for the job of Marshall by knocking out a drunk Indian and then kicking him on the butt and telling him "Get out and stay out, Indian!" And where he catches Chihuahua (seriously), the "Bad Woman," cheating at poker and throws her in a trough of water and tells her that if he catches her again, he'll send her back to the Apache reservation, where she belongs. Even though she's clearly supposed to be hispanic, seemingly Mexican. Of course, she is bad. And dies.)

The thing about Westerns of this era is that they're great filmmaking, but you sort of have to ignore the politics. But seriously. Great.