William Koch has joined his brothers David and Charles as one of 2012's top conservative moneymen. He's given $2 million to the main pro-Romney super-PAC. Bill made much of his money from his family's energy holdings though he's not quite as rich as his better-known siblings. Though he's given money to Republicans such as Rep. Allen West (R-Fla.) and has used his company to lobby against wind turbines off Cape Cod, Bill has not gotten involved with his brothers' shadowy political fundraising operation. What Bill Koch does like to keep: Wine and art.