Robin with kuma's df would possibly be able to beat anyone with a single touch.
:kizabat:
OT-
Luffy with luccis df - stonger brawler with increased stats in all abilities. A nightmare Luffy on steroids.
Zoro with that filler guy's (Eric) kama kama no mi- heavily arguments his basic/flying slashes and gives him increased lethality.
Sanji with the diamond fruit - massively increases his durability and ap. I feel the clear clear fruit would just make his raid suit redundant.
Nami - soul soul fruit - miniture Big Mom with better weather control via her climatact. Her Aoe would also be insane.
Usopp with violas df- would furthur increase his range by a large distance. Shooting from another island kinda thing.
Chopper- idk
Robin with Sugars fruit- neg diffs anyone in the verse with a single touch. Speed is useless against her.
Franky with kids df - becomes an island sized robot.
Brook with the hie hie no mi - flying slashes inbuded with ice (goes nicely along with his theme), while increasing his aoe, range and lethality. It would also be cool to see an undead skeleton regenerating from ice if he ever got tagged.
Jinbe- none. I really don't want to see a fishman lose his ability to swim.