Emerson, Lake & Palmer defined progressive rock in the 1970s by merging classical training, jazz sophistication, and rock intensity. Keyboardist Keith Emerson's virtuosic command of the synthesizer and piano, combined with Greg Lake's expressive vocals and basswork and Carl Palmer's propulsive drumming, created a blueprint for ambitious ensemble playing that influenced generations of musicians across genres. Their compositions demanded serious musicianship and encouraged players to think beyond genre boundaries.