You're forgetting Wu Tang Clan, Nas, Jay-Z, Rakim, Mobb Deep, Scarface, Outkast, Big Daddy Kane, LL Cool J etc. Even throw in BNTH. All are on the level of/higher than 2Pac/NWA as "rappers". As artists it's a different story and Pac is probably top 5 of all time in terms of the total package...