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.
“Examples would indeed be excellent things were not people so modest that none will set, and so vain that none will follow them.”
“If you don't like affirmative action, what is your plan to guarantee a level playing field of opportunity?”