Here's my way of thinking of each one:
Yoda - too small, too cool!
Mace Windu - Well, I do think he could have been better because he wasn't all that great for one of the best jedi on the order, although he was very wise at the same time.
Kenobi - I think he's loved by everyone because the light side love him as he was also a wise and funny guy, while the dark side love him because he didn't prevent Annakin from falling to the dark side.
Luke - Yeh, you can argue that he may be partly dark, but at the end of the day he was inevitably devoted to the light side despite his many signs of the dark side.
My vote goes for Windu