He is not qualified to be GOAT because he has not produced any magic moments like Lin Dan did. Sure he can be successful like Poul Erik, Marin but where is that moment of magic ?
My examples of Lin Dan's moment of magic :-
1) Winning his first All England title - He was up against a very in-form Peter Gade and he was inexperienced. That is one of the best 15-point matches i ever seen.
2) Winning his first key crucial team match for Thomas Cup - Again beating Peter Gade in the team final to score the first point.
3) Holding his own against Lee Chong Wei - Let's be honest with ourselves, Lee Chong Wei is literally unbeatable in 2011. Nobody comes close to beating him and Lin Dan was already close to resigning to that fact BUT he held his own in that WC final and manage to beat Lee Chong Wei by A POINT thanks to Lee Chong Wei bottling it.
4) Defending his Olympic title - Again against Lee Chong Wei. He was mentally prepared for the game and prove his point.
VA may be able to accomplish point 4) BUT I have never seen any of of the 1), 2), 3) from him. Maybe in future.