no. there is plenty, for example:
biggie, tupac, dre, ice cube, and 50 cent. (obviously)
but some of the less obvious: das efx, gravediggaz, killah priest, kid cudi (when he freestyles its quite crazy actually), the game, nate dogg, public enemy, and the list goes on and on.
im sorry i dont like OF or eminem so you can just suck my balls