Hoodless, Nereus, Codemaster are the best Zacks at the moment that come to mind. He's my main but I'm only decent, and I'm not really online much these days. Check the media section for videos on Zack.
Free Step Dodge
RhythmikDesigns
Hold_Junkie93
It's the Zack Beeeam, baby!
LazrrBeamz
Are any of them on PS3 Rhythmik? And lol Junkie yesss!!!