We cannot fairly judge voices from before recording, or even from before high quality recording. I say, in no particular order:
These are not necessarily the female voices I most love to listen to. These are the best ones in a technical sense. These are the ones that can bring the house down.
Three of them are together in this clip:
Here are three of them in a row in their prime:
To be fair, here's Aretha Franklin's younger voice for comparison:
In case you don't believe she belongs in this llist, here is Dolly Parton singing her own composition "Jolene" slowed down to show the perfect phrasing: