I saw limited action, but here are a few that I compared to while watching.
Murphy - PK Subban
Hamilton - Franson or Slower Bouwmeester (Don't take that Franson comparison as an insult. I just see a lot of the same playing style.)
Drouin - Giroux
Mackinnon - Eric Staal/Ryan Getzlaf hybrid
Subban - Carey Price/Ed Belfour
Rielly - Letang
Trouba - Derian Hatcher
Rocco Grimaldi - St. Louis
Grigorenko - Nik Antropov
Barkov is more like Datsyuk than Malkin if we don't compare their sizes. Barkov is good at intercepting passes and forechecking.
Valeri Nichushkin reminds me much of Rick Nash, high skills and strong.
Rasmus Ristolainen is something like Brent Seabrook. Hits pretty hard, very hard slapshot and good at both sides of the rink. And of course very confident with the puck and doesn't take any mistakes with it.