There are two types of leaders among offensive lineman. There is the tough but composed leader who calls out blocking assignments. For Alabama football, that guy is Brad Bozeman.
Then there is the Alpha. The guy you run behind when you must gain two yards. The guy with the most power and ferociousness in the group, who mauls opponents for the sheer joy of it. For Alabama football, that guy is Jonah Williams.
Alabama football has a history of offensive line Alphas. Arguably John Hannah was the most alpha of them all.