Very good? or Elite?
correct, but that's actually all he has.
He scored 57 of those 77 points with McDavid that year. If he spent a good chunk of time away from McDavid that year, he sure as hell has very little to show for it. You're really making a good case... But not the case you're trying to make.
Tavares was one of the top goal scorers for the better part of a decade, one of the top point producers, and Hart finalist, playing with garbage for linemates. Sounds more like McDavid than Draisaitl (and no, I'm not saying Tavares = McDavid - but that situation is certainly a lot closer than Draisaitl's).
Marner, well, we don't really know if his results would be as bad as Draisaitl has proven his are, but odds are against it.