When I spoke at the Invention to Venture Conference hosted by NCIIA, I talked about the fact that there are only a few business people (like Bill Gates and Michael Dell) that have taken a company from nothing to over a billion dollars. When I was signing books, the Vice Provost at IIT, Dennis Roberson gave me his business card which listed many more:

Ken Olsen (DEC)
Jim Trebig (Tandem)
Scott McNealy (SUN)
Tom Watson (IBM)
Ross Perot (EDS)
Charles Wang (CA)

Know of more?