It's Shestyorkin or Fox. I'm going with Igor.
People voting Panarin have no clue what they're saying. Panarin is less valuable to the team than Zibanejad.
Panarin is a great player, but take the game against San Jose a few days ago. The winning goal for San Jose is on him. Lets Karlsson go right by him, and then doesn't cover him when the puck comes back the other way. His defensive impact was pretty good when he joined the team, but the last few years it's gotten worse, and he's squarely a below-average defensive player now. It's almost entirely also effort-based, not analytic based.
If you only look at the box-score, this probably won't show up. He scored a goal in the game. You'll think he must've done well, but last season he was an empty points scorer. He scored a lot of points on the PP, mostly assists, but had a very bad season aside from that. This season, he's playing better, but still not at the level of the other three.