Weird I made a post similar to this recently :
B-Sens - Belleville 2018-2019 Season Part II
Anyway, based on that pyramid, here's how I have it (including rookies recently graduated)
Tier 1 (ELITE) : Chabot
Tier 2 (great chance of Top-6 Fwd/Top-2 D/Good starter) : Batherson, Tkachuk, Brown, White, JBD
Tier 3 (possible they end up very good too but upside just a tier below) : Norris, Formenton, Chlapik, Balcers, Crookshank, Wolanin, Gustavsson, Daccord
Tier 4 (good chance at being contributors but not Top-6 Fwd/Top-2 D) : Jaros, Lajoie, Tychonick, Hogberg, Mandolese
Tier 5 (decent chance at being role/depth players) : Paul, Klimchuk, Luchuk, Nurmi, Kelly, Harpur, Englund
Tier 6 (not likely they ever make it but you never know) : Sturtz, Novak, Beaudin, Rodewald, Loheit, Tambellini, Lindberg, Ahl, Burgess, Bergman, Gendron, Hollett