It's actually a hard question. Two I thought of - Bill Cosby and Bono. Both have done a lot of good for others. Cosby had a scandal or two, one involving possible adultery in the 1970s, another allegations of sexual misconduct, I don't know if that "diminishes" what he has done in any way, or if there is validity to either allegation. Bono has done a lot of good over his career.