Who are the best passers in football? What does it take to be one of football's top ten quarterbacks? Touchdowns. Yardage. Completions. Accuracy. From Johnny Unitas to Peyton Manning, author Barry Wilner has listed the ten greatest quarterbacks (Sammy Baugh, Terry Bradshaw, Tom Brady, John Elway, Brett Favre, Otto Graham, Peyton Manning, Dan Marino, Joe Montana, Johnny Unitas) of both yesterday and today.