The Ahmad Jamal Trio. I saw them once, in Oakland (Yoshi's, I think), although he had an extra percussionist for that run. And it wasn't the same lineup as here. I was just reminded of how great the man's arrangements are when one of his songs popped up in my iTunes playlist. I tend to stop what I'm doing and just listen and after a while I notice I'm smiling.
Usually I'm of the opinion that music can't be "funny" unless it's referencing other pieces and, more likely than not, the words or dramatic situations associated with those pieces. But Ahmad Jamal plays with time and dynamics in such a great way that I smile nonetheless - not "funny" enough for outright laughter, I guess, but still.
According to a little book of quotes I have, Horovitz once said something to the effect of, "Anyone can get applause. But silence, before and during the performance, that is the greatest."
Jamal gets silence from me every time.
I forgot to mention something I noticed when I watched it again. There's a visual correlary to the way the ensmble fits together. Between the three of them, the performers make up one full beard (wraparound chin thing + soul patch + mustache). On purpose?