At high speed no one is better than Kaká. "Standing still dribbling" I'd say Pirlo and regular dribbling Ronadlinho, Ronaldo etc... the usual ones.
If just getting past ones opponent counts I'd say Zambrotta and Cafú, they're always getting thorugh and past their man.
I'd also like to add Ali Karimi, he's just a great dribbler, a wizard.
robinho & c ronaldo.... c ronaldo can do it at top speed and always has it under control ... im not talkin about any end product so dont bring that.. this is about dribbling... robben too he does it with speed and gets past players