Self-explanatory. Feel free to suggest an addition, but I've disabled automatic contributions so people like Barack Obama don't end up here.
http://www.ranker.com/list/the-greatest-u-s-reformers-and-radicals/sesel88,
Eleanor Roosevelt
Elizabeth Cady Stanton
George Seldes
Gloria Steinem
Harriet Tubman
Harvey Milk
Martin Luther King, Jr.
Paul Robeson
Susan B. Anthony
Thomas Paine