If it was "free software prophet" I would be fully on board: I think RMS was way ahead of the curve in foreseeing many of our future dilemmas around privacy, software patents, DRM, the open source movement, and many others.
Or maybe "saint".
Saint Ignucius I hope you mean ;)
Can't be a saint until he's dead.
One of the definitions of messiah is
>a professed or accepted leader of some hope or cause
Seems like an apt description of Stallman, and I'm guessing you were more aware of the Jewish king definition.