I believe every QB needs at minimum 2 better than average WRs no matter who they are.I believe I've got a much better understanding of your point of view.
It appears that you value the overall impact of WRs far higher than I. So much so that it kinda begs the question of just how good Stafford really is if he needs so many, IMO.
BTW, Brandon Cooks was a pretty good WR. As good as Kupp was I'd say in that Super Bowl Goff missing his security blanket had more to do than the lack of talent at the position. But in the end, McVay had no answer for the Pats adjustment to his rushing attack.
Even Manning had 2 really good WRs at the top of his game.