User blog comment:CNBA3/Fairy Tail vs Gandalf/@comment-24102956-20140930202533/@comment-7418318-20140930205430

Are you serious? Even within his own universe... forget the universe, even within just the three "main" LotR books themselves he's not the strongest wizard. Until his power was broken by his own arrogance, Saruman was stronger and Gandalf openly admitted that he wouldn't stand a chance against Sauron.

And the Silmarillion tells stories about several other Maja who'd give Gandalf a run for his money and even the occasional elf of old who could give him at least a hard fight.