As @hilde45 said, one can’t really argue taste.
To me, there is a perfection to Ella’s singing that can seem a bit cool emotionally. Her intonation is beyond perfect -- I’ve never heard a singer do what she does, and so smoothly. I love listening to her singing, and then I move on for a while.
My own tastes run towards the grittier sounding singers such as Abbey Lincoln, Betty Carter, Carmen McRae (especially as she aged), Shirley Horn. The latter two were also fine pianists. Each of them knew how to bend pitch and timing to aim for the heart, and in Carter’s case, sometimes her inventiveness made me laugh.
I’m trying to get to know some of the newer singers who are interesting, not just blond and sultry. Some I’m enjoying are Champian Fuller, Cécile McLoren Salvant, Chantal Chamberlain, and Tierney Sutton.
So much talent! Who are the great new male vocalists?