Known as America's "Acting President," Martin Sheen has my vote. Aside from being a talented actor, Sheen is also an outspoken and tireless crusader for causes ranging from farm workers' rights to nuclear disarmament to poverty around the world.
"Martin Sheen is a pacifist, a social and political activist who has not shied away from putting his body on the front lines, and a devout Roman Catholic. After rediscovering his faith twenty years ago, he began his activist work in earnest..."