In 1310 NHL games, Ovechkin has scored 802 goals; agog average of .612. In 702 games, Pavel Bure scored 437 for a gig OG .622. If Bure had been able to come over at age eighteen, Ovechkin would be chasing both him and Gretzky.
Bure has to stay healthy though. That's the hard part.
Likewise if Gretzky keeps his back and Mario is healthy, OV isn't close like he is now. But, none of them were as durable. OV has been.
As ive stated though, I deal in overall career for this. Peak is wildly difficult to compare with full accuracy.
Are any of these guys better at their best than the others? You can make an argument for each of them, and throw in Hull, Selanne, maybe Mogilny and Yzerman. It seems like too much work to figure out. So I won't.