It has to be Andy Lee.The kid can box and punch.If he has a decent chin he will compete with the best. Others worth mentioning are Peter Quillin,Tyrone Brunson and Joe Green
Agreed, Golovkin is a good technician and has a relentless punching style - though he has to work on his defence and stamina, but hey, he's still a prospect and has fought by far the better competition to Lee's resume... Btw, Golovkin KOed Lucian Bute in the amateurs...
Those who know Golovkin know that he is better than Andy Lee, end of story. Only Americans who have no clue about Golovkin would rate Lee above him. BTW he has already beaten Lee in the amateurs, he holds a knockout win over Lucian Bute as well.