Your list of QBs who won the SB brought a nice smile to my face. I once saw Brad Johnson play live in Detroit. Holy moly he was bad! He threw 19 interceptions that day! (that's hyperbole :-) Everytime I think about that guy winning a SB it makes me laugh and realize that the gods of football like to play tricks upon men.
I think all of us here agree that Stafford was, and still is a great QB. The list of QBs ahead of Stafford is also impressive. The only one I question is ranking Joe Burrow over him, but I'm not familiar enough with Burrow's season to have a strong opinion. However Burrow does not have Stafford's body of proven and consistent work.
Yeah, now that I think about it I'd rank Stafford over Burrow.