That Oldboy fight scene was epic
Personally I loved the fight scenes in Ong Bak, they were very different from much of what was shown before.
Then there is IP MAN where Donnie Yen kicks some serious butt.
There was also this one Jackie Chan movie, I can't remember the title ... I know that one of the final fights took place on a roof of a skyscraper, I remember watching the movie and being mesmerized by the choreography.
All can be found on youtube.
Oh, and let's not forget anything with Steven Segal in it! (joke, relax, hide the torches and pitchforks :P)