I heard Mike & Mike, and they stipulated best 3 QBs. I think that's a more interesting discussion, because lots of teams had a great duo but few have had three good ones.
If you go with best duo, it has to be the Colts and it's not even close. In the NFL Network's recent list of Top 100 players, Unitas is 6 and Manning is 8. Montana is 3 and Young is 81. Average of 7th greatest player of all time, vs. average of 42nd.
It gets a lot trickier when you put in 3. The Packers go shooting way up the list, past SF. And then you have to decide between Green Bay and the Colts. I wouldn't laugh off Bert Jones or anoint Rodgers yet. Being an NFL MVP is a significant accomplishment, and in his prime Jones was pretty much the player that Rodgers is right now. I would argue that Manning and Favre are about equal, that Unitas has a decent edge over Starr, and that right now Jones and Rodgers are very equivalent. So I give the Colts the edge for now, but expect that with the trajectory that Rodgers is on and the likelihood that his success will not be cut short like Jones's was, that the Packers will pass them after a couple more seasons.
Maybe you remember Bert Jones differently than I do. Yes, he was great for one season where he was MVP, All Pro, and selected to the Pro Bowl. Yes, he had a cannon for an arm. Yes, he had some injuries. I'll give you that from 1975 to 1977 he was one of the better QBs in the league. But that's about it. Consider . . .He played 10 seasons and his MVP season was his only Pro Bowl nod.
He had a career 47-49 record as a starter. (Basically he went a combined 16-38 in all his other seasons outside the 75-77 period).
He never won a playoff game (0-3) with a post season passer rating of 59.8.
He only had 5 seasons with 300 attempts or more than 10 starts in a season.
He was Top 5 in the league in yards 3 times and TD twice.
If that's the best the Colts can offer as their #3 all time QB, then they really don't have much to offer past Manning and Unitas. Maybe he is their best option, but with all the other HOF QBs that were in the discussion on Mike & Mike, he didn't seem to fit.
We don't know what Rodgers will do heading forward, but we do know what Jones did overall. And as things stand now, Rodgers has the highest career QB rating in the history of the NFL, both in the regular season and in the post season.