Dipping into the big RCA Duke box again tonight:
The Duke Ellington Centennial Edition: The Complete RCA Victor Recordings (1927-1973)
Discs 11 & 12
Ivie Anderson. The best Ellington vocalist ever? ...Betty Roché comes close, but she didn't stay long. Nell Brookshire was wasn't half bad. Adelaide Hall's and Kay Davis' wordless vocal things were beautiful. ...But I'd put Ivie in the pole position. Anderson may not have had a knock-you-on-your-booty voice -- but she had soul.
IMHO, none of the men come close. I do like Herb Jeffries "Flamingo"; otherwise, I'd rather hear the ladies sing.