I'm not an Ovechkin fan by any means for reasons that aren't important to this particular thread, but surpassing Gretzky to become the all-time goals leader? Come on, that's huge. I'm old enough to remember when Wayne passed Gordie and the attention and significance that was given to that event. If Ovechkin manages to go on to surpass Wayne, I would expect that to be celebrated to the same extent.
I'm a Canadian and respect immensely what Crosby has done for us internationally and with Pittsburgh. His resume is extensive and really, incredible, with some years left to play, and backed up by the eye test. But even acknowledging its subjectivity, Crosby's argument for being "greater" than Ovechkin is kind of flimsy imo. It requires a deep dive into his lengthy resume, factoring in some what-ifs around injury (not his fault, imo), and a healthy amount of team accomplishments (which he played a massive part in). Ovechkin gets to simply point to the goals leaderboard and say "hey, that thing that is most important in winning hockey games? I did that more than anyone else in history. Ever."
At the end of it all, both Ovechkin and Crosby should be recognized as among the top-10 players to ever play the game. Ordering isn't particularly important in my mind, just like its unimportant for Hull vs. Beliveau (the closest analogy we have to these two players.) We got to witness two of the top-10 players of all time, and people should appreciate that more imo.