Who said meteors were the only thing he can do? You're seriously underestimating him!
-Being blind and an Admiral shows he clearly has the best CoA in the Manga by a LOOOOOOOOOOOOOOOOOOOOOOOONGSHOT.
-His Devil Fruit can have so many applications, we've only seen the pull of gravity and levitation of objects
-Lest we not forget he's probably incredible with his Katana anyways
Yeah Kuzan and Sakazuki could beat him, but not easily! The fight would take days and days.
How can a light man defeat a gravity man when light is gravity's b*tch?