When was the hip hop group formed in which Melvin Glover was a  pioneers of rap as lead rapper?
Melle Mel Melvin Glover (born May 15, 1961), better known as Melle Mel and Grandmaster Melle Mel, is an American hip-hop musician – one of the pioneers of rap as lead rapper and main songwriter for Grandmaster Flash and the Furious Five.
West Coast hip hop West Coast hip hop is a hip hop music subgenre that encompasses any artists or music that originate in the West Coast region of the United States. The gangsta rap subgenre of West Coast hip hop began to dominate from a radio play and sales standpoint during the early 1990s with the birth of G-funk and the emergence of Suge Knight and Dr. Dre's Death Row Records.