Deep Purple

Deep Purple is considered one of the pioneers of metal. Beginning in the sixties, they did not become truly successful until the seventies. They began with the psychedelic sound with their hit Hush but changed to the hard rock sound with hits such as Smoke on the Water. Their harder sound helped pave the way for the true rise of metal in the eighties. Decades later the members of Metallica criticized the Hall for neglecting them for so long, prompting their induction. It is agreeably a shame they were not inducted their first year of eligibility.