Naseem folded as soon as he met real competition.Fundamentally, and by the book? I think absolutely not. He dropped his hands so much especially after throwing a combination, backing out with his hands down. Having that left hand down got him clipped, and knocked out (Glen Johnson). You can only be unorthodox for so long until you get exposed. Same thing happened to Prince Naseem. I do not believe an unorthodox fighter can be called the GOAT. He is one of the greatest, and I grew up in a very pro RJJ household. But often times his disregard for, or not wanting to apply sound technique got him clapped when his extraordinary athleticism didn't make up for it.
Roy schooled Toney and Bhop. Totally different class of fighter.