LOL at Crosby being top 5. He's great but at no point in his career has he ever demonstrated that belongs in the top 10 players ever, let alone top 5. McDavid is light years ahead of pre-injury Crosby at his peak, let alone the Sid who has had two 100 pt seasons in 10 years.
If your only argument for a player is "but era," then just make the GOAT list an era based thing and don't even compare past players to current. Otherwise, you need to take into account the fact that modern day players are beneficiaries of yesterday's innovations. It's like saying Einstein wouldn't even be a top 10 physicist today because "bro the guys today are light years ahead." There has to be consideration for how great a player was relative to both their competition at the time, and to the innovations that pre-existed them in the game.
Gretzky is nowhere near the physical talent of McDavid. But Gretzky also fundamentally BROKE the game, and as a result produced numbers that are mind boggling. That factors into the argument.
Similarly, it's even more ridiculous to act like Sid and McD are near each other because "Crosby played in the lower scoring era...of 10 years ago." THEY ARE PEERS. They played in the same era. Crosby came in at a time when players just weren't as good as they are now. The generation of MacKinnon, McDavid, Kucherov, etc. are fundamentally better hockey players than the mid-00s draft class. Nothing about the way the game is played has changed, no major rule changes, goaltending is different but similar...the difference is that a few draft classes happened that involved ungodly talent. That's all. No different from Gretz and Mario being worlds better than dudes who were drafted from 70-78.
So I don't wanna hear about Sid and Ovie being somewhere near McDavid in greatness. Those guys are more comparable to Sakic, Forsberg, and Lindros. Which is amazing. Top 15 players all time type talent. I'm still taking Jagr, Messier, and Yzerman as rounding out the middle to bottom of the top 10.
Wayne, Mario, McDavid, and Orr are in a class of their own. If we're including goalies, Patrick Roy and Dominik Hasek are the Wayne (Roy broke the game) and Mario (Hasek the ultimate talent) of goaltending. No one before or since is comparable.
As for winning the Cup, McDavid isn't 35 years old. He has time. Criticizing him for no Cups when he has played on trash teams up until now isn't fair. Past Oiler teams had ZERO depth. He didn't walk onto a squad with Malkin, Staal, Letang and Fleury on it. It was him and Drai and the bargain bin for a long time. That's finally changing.