You chose three of the best players in the league and also Matthews. I am not sure he gets to any of their level before seeing him at the NHL level. McDavid and Mackinnon are just ridiculous skaters and Leon is strong on the puck. In the CHL he was just as good as any prospect of the last 20 years, but he also isn't as thick as Crosby to not think his size is going to put him in more of the Patrick Kane tier. We'll see if a 5'9 guy can survive as a top 5 player in the league at center.
McDavid ended up even better than pre-draft hype so it is difficult to say. McDavid as a prospect was not as good as Crosby as a prospect. It is still debatable who was better when you consider adjusted numbers, but the fact that there is a debate is a testament to how well McDavid has turned out. I still think when things settle Crosby is going to end up in the top 5 all time and McDavid is not as Crosby is still a 90 point guy at 36 years old. McDavid is having the best offensive peak outside of Lemieux, Jagr and Gretzky since Lafleur though.
Bedard stylistically doesn't play like McDavid and doesn't have anywhere near the speed. He is going into one of the weakest projectable divisions though and most of the teams in it are going to be rebuilding in the next few years so he could get some Ovechkin-level easy competition like the old Southeast division.