Since I'm a Caps fan, I've compared Ovechkin's goal accomplishments vs Gretzky's based on league averages. Taking their goals/game as a percentage of league average goals/game, Ovechkin had the advantage in seasons 1-4, Gretzky took the lead in seasons 5-9 (season 9 basically being a tie), and now Ovechkin back in the lead, and growing since he hasn't slowed down yet, in seasons 10-15. My guess is he doesn't pass Gretzky for most goals all-time (COVID not helping his chances), but he has a shot. And that would be remarkable given the way the game has changed.
Of course, that's just one aspect of the game. I'm not arguing Ovechkin is greater than Gretzky. That would be dumb. But, an argument can be made that Ovechkin's the better goal scorer.