This is partially inspired by @UsedJavelin's thread about Seven Samurai.
I watched a lot of the Western "film canon" when I was younger, and lately I've just been craving some good "artistic" movie content. But I don't trust the :reddit-logo: crowd nor the letterboxd nerds for serious recommendations, so I turn the question to my comrades
Salt of the Earth
The movie itself was blacklisted during the Red Scare. Which is reason enough but it really holds up and the politics are (unfortunately) still very relevant today.