Cool and jazz are not two words that I associate automatically. To be blunt, I find most modern jazz to me academic and vacuous.
However, I have an album by Pascal Schumacher that has been getting heavy rotation. "Change of the Moon" is a quartet piece with the Luxemburger Schumacher on vibes and the excellent Jef Neve on piano.
The tone is definitely acoustic cool school, although there is nothing studied about their playing which shows a solid grounding in the blues.
The best place to hear it is on the "listen & buy" page of his site at
http://www.pascalschumacher.com/.
The quartet will be at Midem on Jan 22. I haven't seen them, but have read good live reviews.
M