One of my absolute favorites was "Unreasonable Man" which was about Raplh Nader. I went in hating him and was floored to find out he'd really spent the 60's and 70's going to the mat on grounds of good civics for the little guy.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
~ George Bernard Shaw