I have a quite few jazz albums now that I really like, but my favourite at the moment is probably Miles Davis
Kind of Blue which, of course, is an immortal classic.
Also, Anteater (another user here) recently tipped me about Return to Forever's self-titled debut which I also liked a lot. I've given it a few spins these last couple of days. It's quite laid back 70s jazz fusion and might appeal to folks who like stuff like Weather Report or Soft Machine. Recommended!