Who are the greatest Rap Group of All Time?

I KNOW. that Outkast is the greatest rap group of all time. Been together forever. No media fights with each other. They got love for each other, been together for over 15 years. Got plenty of Clic Albums. Southernplayalisticadillacmuzik was the one of the GREATEST ALBUMS OF ALL TIME. ATLiens was Clic, Aquemini was Clic, Stankonia was Great, Speakerboxxx/ The Love Below was Great. Some of y'all got on Andre on that album saying he lost it. Ain't nothing wrong with Dre 3000. To me they are the ones who brought out the SOUTH. They sold more records than any rap group in history, had better albums all together. Yeah you got your Wu-Tang, Eric B and Rakim, Geto Boys, UGK, 8Ball and MJG, 36, EPMD, Tribe Called Quest, GangStarr, NWA, The Roots, Little Brother, Red and Meth, Run DMC, Salt and Pepa, and all. But Outkast is the GREATEST RAP GROUP of all time.