I think the jury is still out on how close Ovechkin's peak goal-scoring is to the best in history.
Back in the 50ies and 60ies, Gordie Howe and Bobby Hull more than doubled the production of #10 in goals in their best seasons.
Richard, Beliveau, Geoffrion came up a bit short of that, so we know that Hull's and Howe's peak goal-scoring seasons were the best of their era.
Since then, only Esposito in 1970/71 doubled the goals of #10. Gretzky, Lemieux, Bossy, Brett Hull all tried and came up short, to the tune of leading #10 by 85% instead of 110%.
So we concluded that the times have changed - it just does not sound right that for half a century no goalscorer can peak higher than Bernie Geoffrion (92% lead over #10). And we have stories for why the change happened: expansion, more teams, more first-line players capable of going on a tear and stack top10 in goals with strong results.
Since 90/91, when Brett Hull peaked at 91% lead over #10 in goals, no one was able to come even remotely close. Bure, Ovechkin, Stamkos all peaked at 60%+, Selanne peaked at 58%. This year's race, with two young guys going blazing hot, ended with 41% lead of the winners over #10.
Now, maybe all today's goalscorers are not good enough to match Brett Hull's peak. But then Steve Shutt peaked at 67% lead over #10 two years before Bossy peaked at 73% and six years before Gretzky peaked at 84% - compared to Bure and Ovechkin who peaked at 61% and 63%. So if Bure and Ovechkin are falling short of Gretzky's goal-scoring peak and Brett Hull's peak - are they also falling short of Steve Shutt's peak?
It has been 30 years since Brett Hull's peak, and if nobody has come close, maybe times have changed again and 70-90% leads over #10 in goals are no longer possible. And we have stories of why it should be so: influx of international players, tighter game overall, stars are no longer playing 25 minutes per night. We may want to observe more and if no one leads #10 in goals by 70%+ in the next decade or two, then conclude that Ovechkin's goal-scoring peak is as good as Gretzky's peak.