Linda Ronstadt has one of the best overall female voices ever. She can do EVERY kind of music, from rock and traditional American to Broadway to her heritage Mexican.
Find a better and more versatile voice if you can.
Oh, and unlike many "singers" listed here, she can ACTUALLY SING, which, apparently, has nothing to do with either getting a recording contract or being "popular."
Maria Muldaur sold a LOT of Audio Research/Magneplaner speakers for me in the 1970’s with Midnight at the Oasis.