Kool Keith

Former member of the pioneering old-school hip-hop group Ultramagnetic MCs. He is the first MC to use different aliases/personas/identities in his music, which Wu-Tang Clan would do years later. He has about 20 different aliases/personas/identities, including Dr. Octagon, Black Elvis, and Dr. Dooom. Has inspired many hip-hop artists, even thought a lot of them won't acknowledge that fact. He even used the name Big Willie Smith before Will Smith started using his real name as an MC.