I forgot to add..for MOVIES only: I'm making this up as I go along:
Mainland:
Zhang Zi Yi
Zhou Xun (sometimes gets second lead though)
Xu Jing Lei (also a director)
Gong Li
Zhang Jing Chu (?)
Zhao Wei (definitely not her earlier works...but I think she's still somewhere up there)
Fan Bing Bing (won some awards...?)
Taiwan:
Rene Liu (sort of....)
Shu Qi
Bridgette Lin (in the past, not anymore)
Hong Kong:
Maggie Cheung
Sammi Cheng
Carina Lau
Miriam Yeung
Cecilia Cheung (does she count?)
Sandra Ng
Karena Lam (?)
Karen Mok (?)
Charlie Yeung (?)