Umm.. I have to give multiple votes due the fact that many of the guys listed have individual qualities that make them an excellent commentary overall.
Each of them have the ability to mix well with anybody that comes up and commentates alongside them. They're able to not fubble on top of each others words making it awkward and can talk freely and have great knowledge of the game with that.
I'll be honest, Bibulus manages to do his best to make it to most Calibur tourneys in order to commentate on them, that in itself deserves some recognition.
I've grown fond of Sandman's fastpaced and awkward commentary ^^''
PW is another one I enjoy commentating
And last but not least...and I'mma probs get some shit for this, but Aris is another one I love listening to...his smooth voice <3
Other than that I don't think I've heard the others commentate...altho I am open to listening to them if there are any videos