Dre.....but just barely.
As with my comments on the Dre/Cube battle, I think Dres' overall contributions (NWA, Snoop, Eminem, etc) give him the edge here. Rap would be a much different thing if he'd become Andre the accountant.
Jay is damn, damn good though. If he unretires and makes more awesome material, I could see him passing Dre with a couple more smokin albums.
"Ya'll are brutalizing me!" - Ronwell Dobbs