Frederick Smith, FedEx

Modern-day legend and proof of the American dream, Smith is the founder of one of the biggest companies in the world. Now a $45 billion interest, the idea for it began during Smith’s three-year stint, 1966-69, as a US Marine, where he observed closely the logistics and procurement of the armed forces and was inspired to start up an overnight delivery service for civilians. He founded Federal Express with his $4 million inheritance (modern equivalent $23 million) and raised $91 million ($525 million) in venture capital in 1970.