John Maurice Hartman (July 3, 1923 – September 15, 1983) was an American jazz singer who specialized in ballads and earned critical acclaim, though he was never widely known. He recorded a well-known collaboration with the saxophonist John Coltrane in 1963 called John Coltrane and Johnny Hartman, was briefly a member of Dizzy Gillespie's group and recorded with Erroll Garner. M ... Show More