455. Quiet Riot

With a solid place in history as becoming the first Metal band to crack the top five, Quiet Riot helped to usher in a new wave of Metal that showed that it could be a commercially successful entity. They helped to usher in a new era of Pop Metal which would run rough shot over the next decade. Although they helped to bring it in with their successful album, Metal Health, they never did come close to that level again and essentially imploded within the industry.