2472868, off the top.... Posted by KennyFresh, Tue Dec-14-10 06:07 PM
Parliament/Funkadelic Prince Stereolab Beatles The Rolling Stones Miles Davis The Kinks Madlib Jack White (White Stripes/Raconteurs/Dead Weather) Pink Floyd David Bowie Herbie Hancock Bob Dylan Tom Waits The Neptunes (including fully produced albums like Clipse, Kelis)
but its still a rare accomplishment all the same, especially in rap.