I saw it work for the Bengals in the 1970-80 period where they went to the Superbowl twice. That happened after they brought in a new HC named Forest Gregg.
He was asked by the media what he was going to do with the teams QB problem (sound familiar). His answer is burned into my memories - "no one can throw lying on their back!" At that time, they had an all pro center. In his first season Gregg brought in two significant offensive lineman that started in their first year. Their names were Munoz and Montoya. The rest is history.
Does this start to sound somewhat familiar? - LOL
Your dates are a bit off, and the Bengals only went to the Super Bowl once under Gregg, but you’re right in that a better line definitely helped Ken Anderson.