Best Unknown Jazz Album

Almost anything on Xanadu or BeeHive, The Sunday Afternoon at the Vanguard series on Solid State. There are only a few, but the LPs on Warwick are excellent too. Because these are not Blue Note or Prestige, they can usually be picked up at a good price.

Lee Ritenour- 'This is Love'. Great recording/great music.
Not on any audiophile list that I've ever seen.

Check out a relative newcomer: Jane Monheit. She has an incredible voice. Her backup includes Kenny Barron and others. Her rendition of "Somewhere Over the Rainbow" is breathtaking

Anyone ever heard Dave Liebman's Lookout Farm album on ECM? The first cut is a marvel of mid-70s fusion, with touches of Santana and the Dead (and I'm not a fusion fan).

Man, I wish I could find a clean copy of this.

Bug Music, by Don Byron. It's a recent release, so it qualifies more as not yet well known.