Lenny Bruce http://en.wikipedia.org/wiki/Lenny_Bruce
There may never be another performer like him. He took free speach to a new level by having the balls to practice it long before others dared to use comedy to make political and social statement. The establishment hated him as much as you will love him.
Check out the film
Lenny http://imdb.com/title/tt0071746/
Dustim Hoffman is amazing in Bob Fosse's 1974 masterpiece! You will appreciate the impact one man can have on our collective-reactive-DNA.