4. Michael Milke Michael Milken was a financier, known for his philanthropic work including the famous Milken Institute Global Conference, which was designed as a forum for scholars to discuss social and economic issues.
Milken was also Knowledge Universe's chairman, operating thousands of preschools throughout with about 40,000 employees.
He was released 1993, but is still under investigation on suspicion of violating the terms of his ban from the securities industry.