I'd give it to the Ice Man Kuzan (kinda rhymes...Haha).
He is strong enough to the point where Doflamingo backed down...someone Law himself is trying to avoid all together (even with the Straw Hats so I would say that shows you how strong Doffy is to our current Mugiwara team).
So when the guy they are trying to avoid is unwilling to fight Aokiji....I'd say that shows his strength.
Now as far as a fight goes, Kuzan has the endurance of 10 days against an enemy of equal strength if not a tad stronger (Red Dog Sakazuki) so I wouldn't say the Trio can outlast them.
Before his current level, he was capable of Soloing Vice Admiral Saul with a Very Low difficulty (while yes Saul was Running....the fact remains he has 1 hit kill attacks on people of high rank).
While the Trio now possesses Haki, Kuzan has been shown to survive Haki imbued strikes from Top-Tier characters (I.E. Whitebeard). As such, it doesn't define the Trio's victory just because they csn use Haki to hit him.
Overall, Aokiji Kuzan is winning this in my opinion.