[Rain Man]

One cannot rationally pick Tom Brady over Otto Graham. Otto Graham had more years as a top-three passer and more championships. So Brady is out of the running unless you want to count something like longevity, and I think Otto Graham may stack up well there too if you control for the shorter average career length in his era due to medical technology and smaller paychecks to keep guys playing.

Logically speaking, it has to be either Peyton Manning (most years as a top-three quarterback by far) or Otto Graham (best combo of top-three years and championships), or Dan Marino (most productive quarterback relative to his era, and subjectively threw the prettiest passes).