Great Entrepreneur:
Shigeru Miyamoto (Sure, he never Actually /Owned/ Nintendo, but he turned it into the third largest company in Japan, and I think that's merit)
Gregg Steinhafel (Owner of Target)
Richard M. Schulze (Founder of Best Buy)
Walt Disney? (Could be Great Artist, though)
Great Artist:
Tom Fulp (When you founded Newgrounds.com, you made Internet culture)
moot/Christopher Poole (Same thing with 4 Chan)
Either Donald Fagen or Walter Becker (Steely Dan)
Slash (Or any other FOUNDING member) (Guns 'n Roses)
Any current or founder member of Filter or just Filter itself
Any member of Nirvana or just Nirvana itself
Any current or founder member of Pearl Jam or just Pearl Jam itself
Tom Cruise (Actor)
Arnold Swartzenager (Sp?) (Actor)
Ronaldo (Football player)
Derek Jeter (The bigest Baseball player not accused with Drugs in America)
Ben Roethlisberger (Quarterback for my favorite American Football team)
Also, Al Gore as a Great Person, really? How about have Jack Thompson as a great Intellectual, then, while your at it? Plus, if your going to have Benedict XVI, you mind as well have John Paul II.