No-one is greatest ever, claiming as "greatest ever" is exaggerated, overly hype. The question should be "is PM an excellent QB?" Yes, he is for now. Moving along with timeline, 10 or 20 or 50 years from now, those grandson/grand-grandson generation, they wouldn't care who Peyton M was, what actually remind them the past? The answer is the championship, meaning the more SB blings the QB has, the higher chance they got reminded or mentioned in next, next generation. Even now, Dan Marino rarely got mentioned.