What/Who does Golovkin have to beat to become an ATG?

[Mr_Forte]

He has to beat the greats of his era in close weight divisions like Floyd, Canelo, Cotto, Lara, and Ward. You cannot become a legitimate HOF or ATG if you don't fight the best of your era.

Lara hasn't beaten the greats of his era.....he's lost to them.