I have a long list since this has been a sweet spot for me for the last decade. I don’t know about "best," but some interesting ones include:
Milt Ward & Virgo Spectrum (reissued as a needle drop- the OG is now very scarce and worthwhile if you can find one in unmolested condition);
Ronnie Boykins, The Will Come, Is Now- it sounds like everybody is out of tune but wait-- they pull together beautifully;
Jothan Collins- Winds of Change- Birmingham, Ala educator who studied under Nathan Davis at Pitt;
Nathan Davis-6th Sense In The 11th House- famous for his stints in Paris, followed by his organization of various jazz studies programs when he returned to the States, this is one of his seminal albums, on Segue Records;
Woody Shaw- Blackstone Legacy- not exactly obscure, but hard to find in top condition as an OG. Recently reissued and worth every penny. (So is the OG if you can find a clean copy at a decent price);
Cecil McBee- Mutima- I realized I’ve been listening to McBee since the ’80s and he appears on so many influential post-bop records. This one, on Strata-East, features McBee. One of the most melodic and "inside the track" players, always complementing rather than distracting from the main theme.
Nate Morgan- Journey into Nigritia--killer keyboard player, part of the West Coast scene, on Nimbus West, along with Horace Tapscott, whose
Live at I.U.C.C. (particularly side three) is just stupendous. It’s a large band, not quite as out there as Sun Ra, superb musicianship, lots to engage you.
One blues record to leave you with Calvin Leavy- Cummins Prison Farm- originally released as a single, it found its way onto an album released in Japan. Real deal blues, not played by rote, and a good voice.
Enjoy,
Bill Hart