There was some talk about poor old George in the 007 thread, his career really went downhill after he left the Bond series, but he managed to get some roles at least.
Thought I'd list the movies he appeared in after On Her Majesty's Secret Service that I have seen, most of them on old rental tapes.
Universal Soldier (1971)
His first film after OHMSS, it's not an action film as one might think. Lazenby plays an arms-dealer that gets second thoughts about what he is doing. It's an odd film i would say, worth seeing if you're a fan of GL (which I'm not really).
A kung fu movie also starring well-known Angela Mao, nothing special but an ok movie.
The Man from Hong Kong (1975)
An Australian / Hong Kong co-production, Lazenby plays the bad guy and Jimmy Wang Yu the hero in this action movie. A pretty good film.
Freeze Bomb (1978)
Also known as Death Dimension, to me this is the best kung fu movie Lazenby appeared in. It also stars Jim Kelly from Enter the Dragon.
I haven't seen Queens Ransom (1976) another GL kung fu movie.