Pronmans report on Marner, Strome and Hannifin. I have access to the top 30 if someone wants to see someone else:
3. Mitch Marner
C, London (OHL)
DOB: 5/5/97 | Ht: 5-11 | Wt: 163
2014-15 GP: 63 | G: 44 | A: 82
Marner had a fantastic 17-year-old season in the OHL, racking up an absurd amount of points. He's a shifty player, and is tough for a defense to stop. His speed, acceleration and edge control are all high-end, and because of that, you rarely saw an OHL defenseman land a clean check on Marner. His puck skills are elite, and he can make great in-tight plays to evade pressure, dekes in full stride to get around a defender or puck plays off the half-boards that create offense in bunches.
Marner is also an incredible passer, making quick reads with the ability to stretch the ice or move it across laterally through traffic with consistency. While small, his defensive game is solid, and improved quite notably over the course of the OHL season to where he became one of London's better penalty killers. He's also quite an effective forechecker, not in terms of physical play, but rather how well he forces plays and is sneaky on takeaways.
Ranking explanation: Marner and Dylan Strome were both among the very top scorers in the OHL this season, and both had under-18 seasons that were among the very best of the past 10 years in terms of statistical production.
It's a push in terms of pure hockey sense, although they're better in different ways: Marner is a little more creative and a little better in his defensive reads, while Strome's vision is probably a notch higher. Marner's skating is significantly better than Strome's especially in terms of speed, but Strome has a good four inches on Marner. Marner's production was aided by playing on a stacked London team, while Strome played with McDavid -- albeit typically just on the power play.
The skating difference is really what sways me, even with the size discrepancy, given their puck skills are close and Marner has shown he can defend. Skating kills in the NHL, in terms of being able to gain the zone with control of the puck, and Marner is ahead there.
4. Dylan Strome
C, Erie (OHL)
DOB: 3/7/97 | Ht: 6-3 | Wt: 187
2014-15 GP: 68 | G: 45 | A: 84
Strome was one of the very top scorers in the OHL this season, and while many point to the teammate effect with McDavid on the same team, he didn't play with him much at even strength, yet still managed a roughly 1.5 points-per-game pace when McDavid was hurt.
"He's a big center with high-end skill. You're never going to find that anywhere but the top of the draft" said one scout.
Strome is a great stick handler, especially for a 6-3 player, but he's also smart with the puck. He slows the play down very well, operates well in tight spaces and has the offensive instincts to evade pressure at a high level. He's not great defensively yet, although he's fine on the draw and could project to have decent defensive value down the line.
Strome's main weakness is his skating, as he lacks an explosive top gear and is just roughly average in that area overall.
Ranking explanation: The ranking of Marner and Strome ahead of Noah Hanifin was discussed in depth here.
5. Noah Hanifin
D, Boston College (Hockey East)
DOB: 1/25/97 | Ht: 6-2 | Wt: 205
2014-15 GP: 37 | G: 5 | A: 18
Hanifin is an elite all-around defenseman who has a real chance to be in the NHL next season should he choose to leave Boston College. He's a high-end skater who moves incredibly well for a player of his size. His first few steps are explosive, with as much power out of his pivots and crossovers as you'll see in a defenseman, making him very dangerous in transition.
His puck skills and offensive IQ don't blow you away, but he's very good in those areas. Hanifin can make the quick passes, lead a rush in a dynamic way and makes good decisions with the puck.
Defensively, he closes his gaps well, uses his stick effectively and projects as a player who can stop good forwards. Overall, his game is a high-tempo, high-energy style, though he's not the most bruising defender.
Ranking explanation: Despite the positional differences and the value it gives Mathew Barzal, overall there is a talent drop-off here. Hanifin's accomplishments during the past two years have been extremely impressive, and it's only because of the incredible seasons of the four players ranked ahead of him that he's slotted No. 5.
On pure talent, Barzal is not too far away from Hanifin. They're both elite skaters, Barzal is better with the puck, and both are very smart. However, Hanifin has a major size edge, and is very good defensively. At the end of the day, output wins out. As an under-18 defenseman in Hockey East, Hanifin has been spectacular, and he was impressive as a double underage at the IIHF World Junior Championships. Barzal's talent level is high-end, and I love the upside, but he just doesn't have the same resume, as he was pretty good but not amazing in 2014-15.