I love the combination: joint piano and vibes front line, with intricate traded solos, with or without a rhythm section or an occasional horn.
There's obviously the classic Hutcherson / Hancock Blue Notes, and the MJQ. I would also include Oscar Peterson and Milt Jackson on Pablo, Khan Jamal and Matthew Ship, and Burton's Hotel Hello with Steve Swallow on electric piano.
What are.some other examples I'm missing?