The only one I know is Jake Choi and he already has a thread devoted to him.
If you like Asian males nude, check out the films by a director known as Scud. I think he's out of Hong Kong and his movies feature lots of full frontal nudity and gay themes. I bought several from TLA Video. They may stream them, I don't know. Here is Scud's IMDB entry with his films.
Scud
Scud