Beaulieu is the wildcard of our top 5 prospects. He has the potential to be the second best player of the 5, but right now I certainly wouldn't rank him second. I think I'd personally have Tinordi 2nd, and then it's pretty much a 3 way tie between LL, Collberg, and Beaulieu.
Well it depends what you are looking for when making such a ranking. I'm pretty confident both Tinordi and LL will be NHLers, but I don't think it's very likely either will be high end; Personally I suspect Leblanc will be a 2nd/3rd line tweener, as in a great third liner or a second liner depending on how your team is balanced, but from what I see from him I don't see a guy who will light up the scoreboard. Tinordi has the potential to be a top pairing guy but I think his realistic upside is a high end 4th defender, like Leblanc the type of valuable player every team wants but not typically regarded as the difference maker.
Collberg and Beaulieu on the other hand have all-star potential, but also greater risks. I'm pretty confident Collberg will be an NHLer, but there's a chance he ends up nothing more than a one dimensional depth scorer; there's also a chance he ends up a first liner. Beaulieu is an even bigger risk but he has all the tools to at least be a mid pairing PP specialist and a ceiling comparable to Subban.
HF ranks LL a 7B, Tinordi a 7.5C, Beaulieu an 8C and Collberg an 8D. Gally is an 8.5C to them. I sort of agree with those, saying Collberg has a higher risk than Beaulieu makes sense if you consider only upside (Collberg is less likely to bust but also less likely to be elite IMO)
For me, because I value upside when you discuss high end prospects, the top 5 ranking is Galchenyuk, Beaulieu, Collberg, Tinordi, Leblanc.