To me, I'd put Goff and Cousins as equals. Both are above average, good and solid, dependable NFL QBs, but nowhere near the elite.
Stafford is in the elite group, but certainly not at the top of the list. His inherent daring and ability to shake off adversity makes him that one step higher in my book.
Plus, he has incredible and rare arm talent and the ability to throw effectively from almost any platform or angle. Only a guy like Mahomes is Stafford's equal in that department.
Of course, the HC matters and always has. HCs and QBs must be closely aligned. Goff clearly is in a mind-meld with Campbell, and Stafford with McVay. Good for both pairings. The reverse wouldn't (and didn't) work. Goff drove McVay nuts and I have no doubt Stafford's sometimes recklessness would cause Campbell a lot of anxiety.
Goff and Cousins have similar arm talent and approach to the game. They both need clean pockets and need to have their feet firmly under them to complete a throw. They are not risk takers and play the game somewhat conservatively.
