Not sure if you just want female soul singers. If so you should begin with the woman who has been doing it longer than anyone, Etta James -- This woman is the real deal, check it out. And plenty of horns too.:
Soul doesn't get any better than this song which Etta OWNS (Beyonce Who?)
The original recording:
And a couple of live versions, each individually fantastic interpretations, just like great jazz. If chills don't run up and down your spine at 2:53 and from 4:15 on in this first one, better go to the ER for an EKG and a heart transplant.
In 1977, obviously younger and more powerful
On the BB King show in duet w/ Dr. John:
Lest you think this signature song is all she could do, check out her cover of the Eagles song
Take It to The Limit if you want to hear what a real soul singer can do. She probably could sing the L.A. phone book and rip your guts out doing it.
Koko Taylor -- another great soul singer (Wang Dang Doodle) doing Etta's song justice (unlike Beyonce who should go back to the shed.)
Plus all time greats:
Tina Turner -- !!!!!
Aretha -- The Queen of Soul
Patti LaBelle -- The Soul Diva of them all!! Has Pipes that don't quit.
Erma Franklin -- Did the original
Piece of My Heart that Janis stole.
Betty Everette -- You're No Good
Tammi Terrell -- Beautiful, alone or with Marvin Gaye
Maxine Brown -- Oh No, Not My Baby
Fontella Bass -- Rescue Me
Carla Thomas -- B.a.b.y., Tramp w/ Otis Redding, and w/ Rufus
Motown -- Mary Wells, Martha and the Vandellas, the Supremes, the Marvelettes