Shanks, Big Mom, Rayleigh, Luffy, Doflamingo, Kuma, Zoro, Mihawk, Kaido, Dragon, Garp, Aokiji, Akainu, Kizaru, Fujitora, Marco, Aramaki, Blackbeard

Also Sanji, Vista, full-moon Carrot, full-moon Bepo, Law, Kidd, Katakuri, Sabo, Jozu, Usopp, Blackbeard sniper, Yassop, Roger guy with sunglasses, Sengoku, Ben Beckman, Lucky Roo, Bartlemeo, Jinbei, Whitebeard, Enel, Blueno, Oars with Broggy's shadow, WIPER, JOHNNY, YOSAKU, ICEBERG, LETTUCE DISH AND PAULIE
All current (except Whitebeard. He's pre-marineford, but healthy)

Vs the four gorosei

Can they win? If too strong, take out Johnny and Wiper

If too weak, add Roger, Rocks and Perona

I think they can do it. Beat them up, electrocute, water bullet, magma, ignite, freeze them, separate them into body parts and then throw them in the ocean.