Dr. Dre ($800 Million)
Although Dr. Dre is mostly known for being the person behind one of the most popular rappers in the world, Eminem, he was also a very successful rapper himself. Despite his success as a rapper, he venture into music production and made quite a name and loads of money. Not one to shy away from a challenging venture, he is a businessman that is not afraid of taking risks for thing he believes in. This very nature caused him to back Eminem at a time when no music production house would support a White Male Rapper. The rest, as they say, is history. Eminem became a major success and Dr. Dre made plenty of money.