Well, in my opinion, Rap is good.
....But that's just from 1995-1999, since i think rap died in '99 ( Almost everything changed when compared to new rap, it's 'gangsta' and repeating itself with the same beat all the time, while the 90's stuff was melodic, etc..).
My recomendations would be Coolio and 2pac, since i don't listen to rap that much.