i'd say Eminem but technically, the first time i saw Destiny's Child with their song No, No, No, i thought they were rapping cause apart from Spice Girls, Solid Harmony, All Saints, and the other girl bands during those times, they're the only ones who sings their song faster. and i actually thought that was rapping.

until i heard Eminem talking which is 10 times faster than Beyonce singing.

It's a fun to watch how Eminem's songs have changed since that old times:)

I think the first rap album I ever heard was the Slim Shady LP. I remember this older kid in the neighborhood owned it and me and my friends would go over and listen to it at like 7 at night haha.