1. Thomas Jefferson--AKA "The Man" I mean look at what he did. Primary author of the Declaration of Independence should be enough, but he also went on to become president. You can't beat that.
millercenter.org/academic/americanpresident/jefferson
2. George Washington--AKA "G-Dub" First president of the US of A is impressive, but this guy was also a leader in the fight for independence. He was a master tactician and a great soldier.
sc94.ameslab.gov/TOUR/gwash.html
3. Thomas Edison--AKA "Mr. Light bulb" You probably didn't see this one coming, but it's not a mistake. The Wizard of Minlow Park gave the world some of its greatest inventions (Electric Grid anyone?), and he deserves his recognition.
www.thomasedison.com/
4. William Gates--AKA "Bill" Not all of these guys are ancient. Ever heard of Microsoft? Say hello to Bill's pride and joy. His contributions to this technological age are numerous.
www.thegatesnotes.com/Default.aspx
5. Robert E. Lee--AKA "State Loyalty" What?!?!?!? That's right, Robert E. Lee, leader of the Confederate army, is one of the most important Americans in history. He was a symbol of what it means to be an American. He stood up for his home state of Virginia in the Civil War and was a hero to many.
http://www.robertelee.org/