@audio-b-dog
This covers a wide range. A few aren’t solely acoustic but all clearly draw from acoustic genres.
Instrumental:
Strength in Numbers: Telluride Sessions
Douglas, Meyer, Barenberg: Skip, Hop and Wobble
Daryl Anger, Mike Marshall: Woodshop
Tony Rice Unit: Devlin
Chris Thile: Not All Who Wander Are Lost
Celtic "plus":
Solas: The Words that Remain
Mick McCauley and Winifred Horan: Serenade (Horan is a very accomplished, Classically trained violinist/fiddler)
Bluegrass "plus":
Newgrass Revival: Hold to a Dream
Sarah Jarosz: Sarah Jarosz
Peter Rowan, Tony Rice: Quartet
Stray Birds: Magic Fire
Steel Wheels: Live at Goose Creek
Old Timey + Jazz
Lindsay Lou and the Flatbellys: Ionia
Folk "plus" :
Birds of Chicago : Live from Space
Aoife ’O Donovan: In the Magic Hour (really uncategorizable -- strong Classical influence)
Bluegrass + Jamband:
Railroad Earth: Last of the Outlaws (check out the suite-like middle portion)
My categories are loose. There may be much here you don’t like. Taste is so subjective. But start with the first group and also check out Edgar Meyer and Mark ’O Connor discographies for more Classically inclined genre mash-ups. Check out Bela Fleck for Jazzier forays. Jerry Douglas solo recordings go in various stylistic directions. Jazz is by no means a constant factor but does show up here and there.
Perhaps you will find one or two titles that draw you into deeper explorations.
Thanks to our fellow jazz thread regulars for indulging us, here.