I admit that the QB has to be a leader. I disagree that he has to be exactly like Aikman. Purdy is not exactly a firestorm out on the field or on the bench and his team gets it done because they have CMC, Kittle and Deebo. There have been QB who are not shouters or arm wavers who have won the Super Bowl in the past. But I do think every winner has someone, or maybe multiple, players to be on the field leaders. The 1990s Cowboys have Aikman, but they also had Emmitt and Irvin who led the team in different ways.
Maybe Ferguson can become on of those leaders. I don't know about CeeDee because he seems to be more about himself.
The defense lacks leadership too.