1. Kurtis Blow
He became the first rapper to sign a major label record deal (Mercury) and the first rapper to appear on national television (Soul Train).
2. MC Happer
Hammer is the first rapper to have an album go Diamond.
3. The SugarHill Gang
The Sugarhill Gang anthem is known as the first rap song to get radio play and the first Hip-Hop single to become a Top 40 hit on Billboard.
“Hey Ya” became the first song in iTunes’ history to reach one million downloads, making it the first song to achieve platinum status online.
5. Three 6 Mafia
They became the first Hip-Hop group to win an Academy Award for ‘Best Original Song’ with the track, “It’s Hard Out Here For A Pimp” from the film, Hustle and Flow. – See more at: http://hiphopwired.com/2012/02/28/that-was-me-first-10-rappers-that-made-hip-hop-history/3/#sthash.1TiUOUsj.dpuf