After spending a bunch of time reading scouting reports and watching video of some of the names being mentioned, here's a list of who I'd draft (in order) of realistic possibilities at #7:
1) Elias Lindholm
I know everyone wants Monahan, but if Lindholm magically falls down to #7 because of CAR/CGY somehow taking Monahan/Nichushkin before him, he's the de-facto pick for me. Strong 2-way center who thinks and plays the game like Nick Backstrom. His frame and stride are more like Marcus Johansson. Not the big center we've been craving, but too good of a talent not to take with the pick. Bonafide 1st line C potential.
Comp: Nicklas Backstrom's puck skills/vision with Marcus Johansson's frame/grit
2) Sean Monahan
Big 2-way center who plays physical, oozes hockey sense, and comes as a great face-off man who can play the 2-way game. Basically the ideal 2C given the division we're about to enter. 6'2, 200+. Not spectacular at any specific offensive facet, but is complete in ever aspect. Very useful player.
Comp: David Backes, Patrice Bergeron
3) Rasmus Ristolainen
To me he's the best of the available defensemen. 6'4, 200+, and a great skater for his size. He's got good puck-handling ability, puck-rushing ability, and puck-distribution ability. He's lauded for his offensive creativity and instincts. He's got an above-average shot, and is playing the PP as a teenager for his FNL team. He likes to be physical, often throwing big hits, and isn't afraid to take the body. However, similar to Justin Schultz, he is quite raw in the defensive end. Poor positioning/awareness that has cost him playing in the FNL. But that part of the game can be taught - and he's got the size and skating to handle big NHL forwards.
Comp: Alex Pietrangelo
4) Darnell Nurse
Big-bodied defenseman that plays the shut-down game well and is starting to show some decent offensive capabilities as well. Not an elite puck-handler like Ristolainen, but can make smart plays with it as he starts to grow more confident with the puck. Definitely feeds off of his linemate Sproule for a lot of his offensive production. But hits like a beast, is fundamentally sound in his own end, and has a lot of growth potential to become a useful offensive defenseman.
Comp: Brent Seabrook
5) Nikita Zadorov
Big bodied defenseman similar to Nurse who has arguably better mobility, better shooting, and better defense than Nurse or Ristolainen. His puck-handling is really questionable, and doesn't really strike me as a break-out defenseman. He's got great shooting, and has potential to become a top-4 defenseman.
Comp: Pavel Kubina, Alex Edler