As far as all-time rankings, I don't think he'll ever do enough to break the big 4 unless he's still scoring 100 points in his late 30s (37+) and plateaus at a very high level in the latter half of his career. Gretzky peaked way higher for much longer. Orr was a generational offensive talent while still being the 1st or 2nd best defensively in his position. Mario didn't have the longevity of Gretzky but was still his equal offensively and could still dominate in his old age. While I do have McDavid's peak a bit above Howe's , Howe's consistency and longevity are genuinely otherworldly as he was able to hit 100 points in his 40s. On top of his longevity/prime, he was also a multidimensional player due to his defensive play and physicality. As it is, my top 4 is: Gretzky, Orr, Lemieux, Howe but I also am in the camp of evaluating players based on their peak/prime so I don't have an issue with people ranking Howe higher than I have him. As far as peaks, I would say McDavid has a strong case for 4th all time in all honesty, but I don't see any argument whatsoever for him above those 3 so I doubt he'll ever be #2 in my book based on my criteria. As it is though, I'm pretty certain he'll finish as the undisputed #5. I'd be pretty interested to see if he can give Howe a run for his money though.