More importantly, they were the first group to add bass, drums, and keyboards to the standard quartet accompaniment of solo guitar, resulting in a sound that horrified traditionalists but appealed to younger listeners -- so much so, in fact, that the Mighty Clouds became the first gospel act ever to appear on television's Soul Train, where they performed their disco smash "Mighty High." Their crossover success continued with opening slots for secular pop stars including Marvin Gaye, the Rolling Stones, and Paul Simon, whom the group backed during a monthlong stint at Madison Square Garden. While lineup changes plagued the Mighty Clouds throughout their career, they remained active into the new millennium; in addition to co-founders Ligon and Wallace, their latter-day incarnation also included Paul Beasley, Michael McCowin, Wilbert Williams, Johnny Valentine, and Ron Staples. As the years advanced, Ligon took a more supportive singing role, with lead vocals performed by ex-Gospel Keynotes vocalist Beasley. Ligon died in December 2016 at the age of 80. ~ Jason Ankeny, Rovi