you can get any of the knowledge and wisdom mc's to come out; demolition man, top cat, tenor fly, peter bouncer, cowboy ranger, dyer mc, even terry t's gettin' on the mic now BUT!! it's gonna cost you!
but, it's definately worth it!!
Also! one of my favorite ragga mc's Bass Nacho! He kills it on the mic and on all the tunes he's done vocals on! stuff w/ chopstick, rcola etc..