Mel Tormé (1925-1999). He started as a drummer but fairly quickly chose to start singing and was quite successful from the 1950s onwards. Starting in 1955, he recorded excellent albums together with pianist and arranger Marty Paich. Today a broad selection: Mel Tormé with the Marty Paich Dek-tette.
Sources:
Mel Tormé and the Marty Paich Dek-tette
(Giants of Jazz CD 0230)
Mel Tormé: Orchestra conducted by Marty Paich
(Verve 823 010-2)