I hate the term "generational". Only McDavid and Crosby could be considered as such for recent years, at least in terms of forwards.
Kane isn't generational. Toews isn't either. McKinnon, Eichel, Matthews, and Laine aren't either. But these guys are gamebreaking talents. That's what a team needs to compete, individuals who can break a stalemate in a playoff game and then celebrate with an awesome celly.
I'll be happy to welcome Hughes in if he comes here. Same with Kakko too. Both have legit gamebreaking potential. Any pick after that still has a chance, especially the immediate picks after, but the odds start dwindling real fast the later the pick.