65. Stephen Ross
His last name is plastered across the University of Michigan—on the business school, the athletic campus and the academic center. The real estate developer has given $378 million to his alma mater, including a $50 million gift in September to support student career development and student-run investment funds. He’s behind America’s largest private real estate project: the $25 billion Hudson Yards, a 28-acre stretch on Manhattan’s West Side, which counts among its tenants Coach, L’oréal and Blackrock.