Yes, Sundoq, I agree that the guitar as a rhythm instrument can be very great. . . but I still love the piano, I'm not sure I think the guitar is superior in any way, it's just apples and oranges I guess.
What do you think of Marty Grosz? I think he's a master accompanist in this manner, and though a good soloist, it's not all about the solo with him, I love the balance. . . .