I think you can make a case for a few guys. Triple H has been a main event fixture and has won over 10 wwe/world titles. Cena has been a main event fixture for over 4 years, has won several world titles and is their biggest current mainstream star. The Undertaker has won world titles and has put on great matches, especially since returning to his deadman gimmick. Edge has won almost 10 titles, although they have been short reigns, and has had several classic feuds. Honorable mention- Kurt Angle, Batista, Orton, HBK. Austin, Rocky and Foley were pretty much all done by 2003, so its hard to really include them.