Why was Stamkos left off the list of how Ovechkin has dominated competition? He's probably closer than anyone else in terms of GPG over the past while I would think.
In terms of pure goal scoring, I think Ovechkin has been one of the best for sure, so far. However, I do think it's way to early to start projecting where he'd finish. He's still over 400 goals behind Gretzky and I think it's pointless to try and extrapolate. As an example, at the same point in Gretzky's career, he was at over 630 goals and he obviously finished nowhere near 1,200+
Bure was scoring at a higher rate than Ovechkin, but injuries caught up to him. Lindros was up there as well. If Ovechkin stays healthy, I think he'll get up there, but even if healthy, inevitable age will catch up to him and keep him short would be my guess.