Kanye West is an ISFP, like Michael Jackson. In stark contrast to his image, he comes across as very subdued and introverted in interviews. fi is obvious (how many fe users interrupt awards shows to say the winner didn't deserve it?), and he's something of a fashion icon, with hedonistic, materialistic tendencies (se). Probably 3w4.
she actually used to have the enneagram 4 description listed on one of her social media sites. i'd agree with ISFP, and the other parts of the tritype though.
(not a fan, but know a lot of her old friends. like the girl in that video at 1:04 hahahaha)
Kanye West and Eminem are far too focused and steadfast to be P. They are ENFJ and INTJ, respectively. Other artists I can type:
Snoop Dogg: ENTP, though ESTP is an almost equally viable possibility
Kid Cudi- INFP
Trademark Da Skydiver- ISTP
Jay Z- ENTJ
Wiz Khalifa- ESFP
Street Wiz- ISTP
Trying to think of an SJ rapper/ hip hop artist...hmm. There aren't many...