User blog comment:Pualover/Overlord Power Level/@comment-34598988-20180224172819/@comment-28784974-20180224181358

Gargantua has the highest stats in comparision to the rest of the FGs, yes. However, he isn't sentient nd therefore doesn't have a will of its own. It's for this reason that Gargantua wasn't placed as the strongest in that list. Also, that list was made by Maruyama himself, so none of us can say anything about it, really.

No, Shalltear isn't stronger than Ainz, or at least it wasn't specifically stated. Her build counters Ainz's own build heavily, this is why the FGs doubted he would win against her.

Correct. However, that's in his human form. Sebas has a draconic form that is more or less, superior to both Cocytus and Albedo.