Every great player is unique so there is no clear comparable. Obviously Elway and (a more athletic) Ben R. Now that he's less of a gunslinger I wouldn't compare Josh to Favre.
Before his career was derailed by injury Bert Jones was pretty much the best and most dominant player on the field. Tough as nails and a great passer.
I guess that's what you call retrospective analysis.
Fortunately not all talking heads are idiots. I think it was Greenie the other day who said that Josh Allen was the best QB he had ever seen, better than Elway his previous fav.
I get the point and it's a good one but Cooper can do a lot more than draw coverage. In what remains of the season I'd like to see Josh and Cooper develop more chemistry in advance of the playoffs. I noticed a couple of plays versus the Lions where Coop had cleanly beaten his man on the outside for what looked to be 6 points. On one occasion it seemed to me like Josh looked his way but wound up going to the opposite side of the field.