Exactly. Those are the guys you give the big $ to because they all (you can make a case against Eli) make the players around them better. To use the baseball metric, those guys have a very high WAR.
That defines the current Dak Prescott conundrum, and is the critical evaluation that must take place on Josh Allen over the next year and a half. I'm optimistic Josh can reach the top level of the QB position, but if the Bills conclude otherwise they have to find the courage to let him walk.