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
Ridley Scott's The Duelists is a drama based loosely on the story of two Napoleonic officer's whose vendetta resulted in a half dozen duels over the course of decades. Many HEMA fighters, fencers, and other swordsman regard it as both the best portrayal of realistic swordfighting, and the best artistic use of realistic swordfighting, in cinema
Bruce Lee's Enter the Dragon is a must see. As an artist there really isn't anyone comparable to Lee's martial arts performances.