When actors get pigeonholed, that's their own doing to a large degree. Because if you do something that people like, obviously they're going to ask you to do it again. It's up to you to say no. If you're that insecure about working, you'll probably do what you're known to do.
I don't act, anyway. The stuff is all injected as we go along. My pictures are made without script or written directions of any kind.