Aldo is the most skilled fighter on the planet at this point in time. Only time will tell what he can accomplish and how highly he will be regarded when it's all said and done.
He has arguably accomplished more than Fedor, GSP and Anderson had at his age, so there's that.
"The world will know that free men stood against a tyrant, that few stood against many, and before this battle was over, even a god-king can bleed." Alexander Gustafsson, the rightful LHW Champion.