Strome hasn't moved up that much, most rankings have him around the 10 spot. The 2 defensmen are almost certainly ahead of him.
He's rising farther and faster than anyone. ISS didn't even have him in their Top 30 as recently as October. Brock Otten now ranks him the second best OHL prospect for the draft. By the time June rolls along I expect him to go 4th or 5th.