User blog comment:Whiskey13/Strongest Admiral/@comment-3242083-20101210011222

Ok guys, here is the official answer: the strongest is Aokiji. That is not my view, watch episode 225. The gorousei say exactly that:

Gorousei 1: "That man again?"

Gorousei 2: "He is probably just out sightseeing, as usual"

Gorousei 2: "Does he ever think about his position?"

Gorousei 3: "It's difficult when he is carelessly moving around like that"

Gorousei 1: "The marine base most powerful fighter.... Admiral Aokiji".

There is your answer, can't argue on facts