He's still a decent and useful player, but Lafreniere. People were throwing around best prospect since McDavid, better than Matthews, Dahlin, Hughes, MacKinnon, and Eichel after his WJC. He simply never had the dynamic skill sets those guys had. Can he still be a useful top line player? Yeah. But, he's not really elite at any one thing.
He was supposed to walk into the league and comfortably be a top line winger. 4 years in, he still isn't that. Maybe he makes a big jump soon.
If we want to go back over 10 years, obviously names like Yakupov, Ryan Murray, etc.
I'm gonna avoid saying Nolan Patrick since while hyped, hard to separate what went wrong from a long string of injuries.