To me Roberta, not Aretha, will always be the Queen of Soul. While Aretha's role in the history of the genre can't be overstated, Roberta had an even more amazing voice, and her best material is stunning. Very sad to hear the news yesterday, I was listening to her stuff a lot a couple of months ago.
I suppose everyone knows
Feel Like Makin' Love and
The First Time Ever I Saw Your Face (which I've never particularly liked) but her best tunes lean into jazz, like this one: