I thought Leehom was sort of keeping low after he got married?There's bankable Asian Americans / Canadians in Asia. But I those guys never get approached by Hollywood for some reason. Leehom Wang, Mark Chao, Daniel Wu are all big leading actors fluent in English. Tony Leung's English is pretty good as well being raised in Hong Kong.
What's interesting to me is that there are quite a number of Chinese actors that can speak English well (to add Nicholas Tse to your list), but in the major blockbusters, it's always Chinese actresses who get picked up for a role even if they don't speak English half as well as those listed Chinese actors do.
Fan Bingbing for IM3 and for Xmen (she can barely even speak Cantonese, much less say English)
Angelababy for Independence Day
Li Bingbing for Transformers (to her credit, I think she speaks better English than the other two)
Donnie Yen is like the only male actor I can think of from the Chinese/HK/Taiwan market that was picked to star in a Hollywood blockbuster.
For Avengers, they also went with Asian female (Claudia Kim) rather than Asian male.
I'm not sure what to think because technically picking a female would help balance the genders of these casts more, but the frequency of "Asian female" over "Asian male" is somewhat suspicious. (It's probably not a coincidence that Donnie Yen was picked for a movie where the main is a female...)