I dunno anything about college hockey but here's previous winners of this award that have NHL significant experience:
2021 - Cole Caulfield. Legit NHL goal scorer.
2019 - Cale Makar. Not much else to say.
2018 - Adam Gaudette, seems like a late bloomer at best who will likely be a career tweener.
2017 - Wil Butcher, hasn't solidified himself in the NHL yet. In and out of Buffalo and New Jersey's lineups.
2016 - Jimmy Vesey, ditto.
2015 - Jack Eichel. Has had injury issues think he'll probably be the future of the Golden Knights.
2014 - Johnny Gaudreau. What else needs to be said?
2013 and prior - From here until 2002, it's mostly guys who never made the NHL. In 2002 it was Jordan Leopold who had an alright career and in 2001 it was Ryan Miller who had a great career.