Try this:
Little Richard, Chuck Berry, Jerry Lee Lewis, Carl Perkins, Everly Brothers, Buddy Holly, Roy Orbison, Shirelles, Crystals, Ronettes, Drifters, Righteous Brothers, Four Tps, Four Seasons, The Beatles, The Rolling Stones, Animals, Aretha Franklin, Temptations, Rascals, Lovin Spoonful, Bob Dylan, Mamas & Papas, The Who, Cream, Jimi Hendrix, Janis Joplin. That doesn't even reach 1970