Pettersson
Glass
Mittelstadt
Kaprizov
E.Svechnikov
Kaprizov is NHL ready but has KHL contract for two more years I believe. All others could potentially play in the NHL next season but could also need another season to get there.
Oh, and if Nick Suzuki is available in your league, I'd have him 1st or 2nd on that list. Suzuki could play in the NHL next season as well.