I think PBF is top notch and his defensive skills are pretty amazing to say the least.
He does though need to soundly beat people like Lyle has listed in order to be a great and i wouldn't see him having any trouble in doing so at all.
Think he'd wipe the floor with all the above mentioned really.
Winning belts at the various weights that Floyd has is special in itself so i have nothing but respect for him.
Like i said he's top notch Material and his ringcraft is different gear