Looking for good recordings of female vocals I have not yet tried...

Possibly now viewed as quite uncool:

Julie London, 'Around Midnight' album1960

Doris Day, Secret Love among many others

Lani Hall (already mentioned) Sergio Mendez &B66 'Equinox' 1967

Swingle Singers, especially with Christiane Legrand (Michel's sister), but the modern incarnations are also good and well recorded, e.g. Bach hits back

Surprised not to see Sarah Vaughn mentioned yet...

All very good suggestions above.

But for an amazing voice performer that no one has mentioned, or probably heard, check out Chris Webster. Locally famous in Northern California. Quboz has only two of her albums, but a good start!

-G

Lucinda Williams

Kevyn Lettau

This is my tidal playlist 

great female vocals