He was asked the MT Rushmore of Def Jam
Left off DMX, Kanye and Jay Z.. I get leaving off Nas. Nas was best with Sony.
Mt. Rushmore mean 4 slots so he 100% right.
That would be LL, Beastie Boys, Public Enemy and Slick Rick. They established the combination of artistic credibility and commercial success that Def Jam was known for. Without them Def Jam don't even exist in the era of DMX and Jay much less Kanye.