I think the 1980-era Chuck Knox teams are underappreciated. Jerry Butler or Reggie McKenzie are my picks. Reggie had a good run with the Bills, starting in 1972.
Bills' offense went from 21 to 24 PPG between 2014 and 2015.
Bills' defense went from 18 to 23 PPG between 2014 and 2015.
I think Tyrod is the guy, until they find someone better. And they need to keep looking and not stand pat because of Tyrod's injury potential and as a backup plan in case he does not continue to improve.