Far too easy.
Streisand. I'm not a fan of her, neccesarily as a person, nor do I really like her voice as of now, but she is a phenomenal performer. And Barbra in her prime, vocally, is astounding.
Eder has a great belt, but she sings songs because she can. Why the hell does she sing "Man of la Mancha" (I am I, Don Quioxte)... because she can belt, and then do a whistle tone bridge. Really, she's just absurdly extraneous to me. She never seems to have any idea what she's singing about, which I despise.
Great voice though.
But Babs all the way.
Personally, I think I have too much bloom.