Datsyuk. He has the fastest hands in tight of all the draft. Kovalev was Smith, whos more creative and uses it as a weapon, Benson uses his hands as a tool. Cristall is the middle ground between the two, i think but I also think he, at times, struggle with his decision making compared to the other two, more along the lines of Drouin.
What made Datsyuk so good was his proprioception along with his hand-eye and superior processing, Benson is the same way. Kane is another good example of this. Smith, and Kovalev, were pure "What if I do this?" Players. Drouin was/is also like this.
Its an approach to the game that some players have, Crosby, Mcdavid are like this too. Lemieux blended both and that is why he is the most impressive player ever. Zegras is like Smith too, just knows what he can do, and like a turn based game, tries to select the appropriate move to try for the situation hes facing. It also requires a high level of processing, but this processing is a lot more planned than reactive, but not in a proactive way. The good thing is, like Zegras, Smith has limit tested the shit out of these moves and the neural pathways have to be hella strong.