Feel free to add to the list. This is just what I personally think.
ENFP: Talib Kweli,
ESFP: Left Eye
ENTP: Celph Titled, Ill Bill, Biggie (Maybe ExTx), B-Real, R.A. The Rugged Man, Ice Cube
ESTP: Eazy E, Necro
ESTJ: Dr Dre
ENTJ: Jay Z, Tech N9ne (maybe INTJ)
INFJ: Andre 3000, NEED MORE!
INFP: Nas, Mos Def?, Reverie
INTP: Slick Rick,
INTJ: Immortal Technique, Vinnie Paz, Apathy (possibly INTP), Guru
ISTP: Eminem (possibly INTP), Snoop Dogg
ISFP: Lauryn Hill, Gavlyn?
My favourite rappers would have to be INFP or INTJ.
Please add to the list though!