It depends on from where, and while JK Rowling, Notch, Rhianna, Jim Simmons, and Taylor Swift's money isn't 100% absolutely clean, because that money comes from somewhere, they also aren't Saudi princes having people eat poop. George Lucas and Steven Spielberg might count. Dolly Parton isn't quite a billionaire in terms of dollars, but is proof that you don't have to be a shitbag to have a lot of money.