T. Rex Carole King Four Tops Al Green Carpenters Curtis Mayfield Curtis Lee Mayfield (June 3, 1942 – December 26, 1999) was an American singer-songwriter, guitarist, and record producer, and one of the most influential musicians behind soul and politically conscious African-American music.[5][6] Dubbed the "Gentle Genius",[7][8] he first achieved success and recognition with the Rock and Roll Hall of Fame-inducted group the Impressions during the civil rights movement of the late 1950s and the 1960s, and later worked as a solo artist.