Everyone is in character
Division commanders being used are Ace, Marco, and Jozu
Whitebeard is healthy
Onoki doesnt have back problems
Jozu and the Raikage have both arms
Marco could take out all the Kage. He's pretty much intangible for one and if he does get hit he's shown himself to be able to recover from fatal damage. He'll easily be faster than any of the Kage too with the exception of possibly Raikage and can easily fight on par with an Admiral. Jozu too is equally powerful and blocked a hit from Mihawk, the same hit which easily cut through Aokiji's iceberg. Whitebeard cause Tsunami's and rip Island's in half, such is his power, so that already far outclasses any feat shown by the Kage.
This is a pretty big stomp. The only possible threat I see here is the Tsuchikage with his powerful jutsu, but he's old and not fast enough.
Aww you left out Vista and put in Jinbei. Well, the Whitebeard Pirates win. If you paid them up most properly it's a pretty clear win. Whitebeard vs Onoki (the oldest and earth types), Despite Onoki's hax, he has nothing that could bypass a quake from Whitebeard. One hit would be enough. Not a horrible win but a pretty clear one. Then Raikage vs Jozu (the brutes) Jozu is clearly stronger and more durable. A might last for some time because of his speed, but he isn't winning. Tsunade and Marco (the melee style regenerators) would be one sided. Marco would just take anything from Tsunade and heal back and in the mean time over power her with his superior maneuverability and haki powered attacks. Next Gaara vs Ace (strongest pure elementals) would be bad for Gaara. They have both demonstrated the ability to manipulate their respective elements in huge quantities, but Ace is intangible and even if he weren't he is physically more adept than Gaara. And lastly, there really is no similarity between Mei and Jinbei, but they are the last ones. And honestly, I'd have to side with Jinbei. Undoubtedly, Terumi's magma is her most dangerous weapon, but Jinbei has gone against Akainu who's ability to wield magma far exceeds Mei's (albeit Jinbei was outmatched himself) but he was able to contain Akainu with his bare hands even while the latter was burning him with magma and eventually overpowered him. But my point is that Mei is not on Akainu's level yet Jinbei could hold his own against the monster. This is probably the only one that isnt a clear win for team Whitebeard. But all the same team Whitebeard would win. Pair them up how you like and still team Whitebeard comes out on top.
Lol i was actually considering putting in vista but his lack of feats kept me from doing so. Sure, he kept up with mihawk, but we didint even get to see him fight that much, so i chose to put in jinbei due to having more feats