Many strict rock ’n’ roll fans think that the Top Forty period from 1959 through 1963 was weak and shallow. Most of the original rockers who molded the ’50s were gone: Elvis had joined the Army, Little Richard joined the church, Chuck Berry went to jail, Jerry Lee Lewis was ostracized, Fats was fading, Bill Haley was retiring, and Buddy Holly died in a plane crash. Who filled the void?