I have a little bit of Chick Corea and Return to Forever, who's song "Hello Again" fits, except a guy is singing, lol..

I just listened to Cortex - Tropeau Bleu.... Very, very nice. Thank you! I'll check out Kathryn Moses after I peruse some more Cortex.

I liked the first album, but the second the drums come in, it's quite active and not slow-tempo at all, but I'll YouTube Flora Purim, and saw on Wikipedia she's guested on a lot of things.

I love her vocals on the song "Return to Forever" - the vocables, which is another great sing about 70s prog-rock -- melodies and singing wonderfully without words as an instrument ala Clare Torrey on "The Great Gig In The Sky"..

not the biggest fan of the vocal belting in The Great Gig in the Sky... but I generally agree with the wordless vocals comment. I've got tons of jazzy wordless singing from 1970's Soundtracks and Library Music albums. I've tried to find every score featuring the wonderful Edda Dell'Orso. But that's rarely full albums of her on every track, and often she's just featured on a couple of songs. Primavera feature Edda on all the song though (the first ten seconds is an annoying intro that's not part of the actual track), so try and find it if you enjoy this. 

And this is a compilation I got from various soundtracks (featuring jazzy scats, plenty of sensual singing, some plain lovely, others with a lot of suspense etc... all magnificent)

-the timestamps here are useless, but I discovered this song here. Absolute perfection imo:

-anyway, if you're only looking for album reccomendations where all songs are exactly like you want it, you're gonna miss out on a lot of great and relevant music. Nothing I've heard by Flora Purim outside of RTF/Corea comes close as far as I know. Her voice is nothing spectacular really, but it's just the perfect fit for those two albums.