Ultimate Dolph

Yuen Biao
Sammo Hung
Vinnie Jones (?)
Richard Norton
Chad Mcqueen.
Robert Ginty
Hector Echavarria
Dominque Vandenberg
Eric Roberts
Stephan Baldwin
Patrick Swayze.
Mel Gibson might also apply having done a lot of action movies.

Lets not forget the first ladies of action:
Cynthia Rothrock
Michelle Yeoh

Yuen Biao is one of the 3 top actors of all time in HK martial arts flicks, big friends with Sammo Hung and Jackie Chan, they are know as the 3 sons or something. Biao was in Project A, Dragons Forever, as well as Righting Wrongs with Cynthia Rothrock.

RObert Ginty is best known for Exterminator 1 and 2 from the early 80's.

Hector Echavarria hasn't done much, a couple of low budget fight films Extreme Dragon being his most well kown. He als appeared as a fighter in Cradle 2 The Grave.

Dominque Vandenberg did the recent film Pit-Fighter which is proving quite popular.