William Mortensen was in Hollywood, and did portraits, though he did a lot more than just portraits of stars. Though he has a pretty famous picture of Jean Harlow.
His book "Pictorial Lighting" is a very interesting read and provides a pretty interesting, simple & logical method for lighting. He only uses 2 lights but can do a whole lot. I'd seriously recommend it; although some people don't like his work mostly thanks to slander from A. Adams, but don't let that dissuade you.