Dan -- I'm not sure whether these are truly obscure. (Maybe not!) But they don't seem to be talked about much, and they've all given me lots of enjoyment.
Richie Beirach - Breathing of Statues (CMP / Magenta) -- One of Beirach's solo masterpieces. Strong classical influence -- e.g., Scriabin, Rachmaninov -- seamlessly blended with jazz.
Bob Moses - When Elephants Dream of Music (Gramavision) -- Very persuasive large ensemble writing & performance. Go for the CD because it has three excellent bonus tracks. The titles will you a sense of the tone of the music: "Everybody Knows When You're Up and In," "Embraceable Jew," "Bugs Bunny," and "Ripped van Winkle."
Bucky Pizzarelli with Bud Freeman - Buck & Bud (Flying Dutchman) -- Duos that just feel right.
Mike Richmond - Dream Waves (Sonet / Inner City) -- This trio was Stan Getz's rhythm section (at that time): Richmond with Andy LaVerne & Billy Hart.
Timeless All Stars - Timeless Heart (Timeless) -- with Bobby Hutcherson, Harold Land, Curtis Fuller, Cedar Walton, Buster Williams & Billy Higgins. Not at all the by-the-numbers all-star jam session you might expect; instead, there's a kind of effortless, subtle vibe somewhat akin to the MJQ. Strong compositions, vital playing.