I think the best is Larsson, but he's not my favorite really...
I love Couturier and Huberdeau, but I guess I'll look at a guy who's not quite as hyped but who I could definitely see rising or just turning out to be a great pick, in Jonas Brodin.
He's a two way defenceman who is a bit on the small side at around 6'1 185, but he's big enough to handle himself. He has excellent in zone vision and is solid positionally, good with getting his stick in passing lanes and breaking up plays... He is decently physical and good at separating his man from the puck. His outlet pass is fantastic and will be extremely valuable in the NHL. He is a good skater but he uses it more for defence than for offence.
In the NHL, I think he will be a solid #3 type 30 point D-Man who plays top PK minutes, 2nd pairing PP, and excels everywhere. He will probably chip in 19-22mins per game, depending on the team.