I think that guy Troy from last season should have one. I didn't see him as a loose cannon. The guy who did win is boring, has no personality and most likely cannot sell anything. Troy, however could sell you a glass of sand in the dessert, and I don't see anything immoroal about him. His mother was sick or something, and he took care of her at the same time built his own successful business. He said he couldn't afford college, it was his mother or college. Just goes to show you what people can do with natural ability.
I know it's not ALL about selling, but Troy had more drive and ambition, and pure raw talent than anyone else.