You might think this is a dumb question, but have you seen any of Tony Jaa's films? They have their flaws (sometimes a lot of flaws), but there's no denying the choreography and action in them are downright amazing. Similarly, under the #martialarts tag, I've posted a few technique breakdowns. You might want to check them out, as they're pretty nifty. Since you're a fan of martial arts films, there is one western I would highly recommend to you, The Good, The Bad, The Weird. It's a Korean western that takes place in China and it's just absolutely fantastic. You can find it on Netflix.Perhaps. I've seen some samurai movies that I like, but westerns usually don't do it for me. My enjoyment of kung fu movies is almost exclusively the spectacle of combat, not really the story (or what passes for one) that holds it all together.
I've seen the first two Ong Bak movies, but haven't gotten around to the third. I like his quite a bit. I have to say, South Korea is doing some of the best movies of just about any genre these days. Oldboy (the original) remains one of my favorite flicks of all time, and The Man From Nowhere is up there in terms of good action movies that actually have some semblance of story. I'd seen the listing for The Good, The Bad, The Weird on Netflix, but hadn't checked it out yet. I'll be sure to do so, especially now that I'm caught up on Game of Thrones.
Watch The Protector. Do not try to follow the plot. It's awful and jumps around. The fight scenes though? Especially the staircase? They're magical. The Man From Nowhere was pretty good. It's a bit intense at parts, but all around the choreography was amazing. South Korea and China both have a lot of great films out there right now, from romances to heist films to comedies. I'm glad Netflix and Hulu both have picked some of them up. Japan really needs to step up their game.