There have been so many great stick-handlers over the years, and certainly some of the very best players in NHL history deserve mention at the top of this list: Gretzky, Lemieux, Jagr, Lafleur, LaFontaine come to mind as supreme stick-handlers in their hey day.
But for my money, nobody has ever been better than Alex Kovalev, when he's on. Not when he's not interested or moody or whatever. But when he's absolutely ON, there's nobody better. The guy could stickhandle a hummer through a china shop and leave there without any glass on the floor. He is mesmerizing with the puck on his stick. It's too bad he doesn't have the will or desire to compete hard every single shift, like some of the all-timers do (did), because with his hands he'd be an unstoppable force. He's still pretty dam good even with his mood swings.
So, for me tops on this list is Kovalev. Schremp has a chance to be very, very good but I don't think he's quite in Kovalev's league.