Fishman Island: No one really stands out much here, they all have their generic fight on the plaza but meh. Zoro does beat Hody in the castle but it ultimately doesn't really matter.
Punk Hazard: Zoro beats Money, Chopper heals the kids at the end with Law, Sanji leads G5 and saves Kinemon Torso, Franky defends Caesar at the end from Baby 5 and Buffalo. The rest doesn't do much but they all really get overshadowed by Law this arc anyway.
Dressrosa: Usopp is the obvious answer here but Franky also performed pretty well, buying time when needed, beating Senõr Pink and destroying the Factory. Zoro beats Pica and starts the movement to slow down the birdcage. Robin gets done insanely dirty here by Oda, she doesn't do shit.
Zou: Sanji leads the gang and manages to have them escape from Capone. Nami Chopper and Brook get points for saving the Minks too.
Whole cake island: Brook contributed a lot more than usual here getting the road poneglyph and destroying mother caramel picture. Nami also pulled here weight in general. Chopper was kind of meh.
Wano: Most strawhats helped by taking down a tobiroppo or a calamity but Zoro outshines everyone thanks to not only taking down King but also fighting the emperors on the roof and saving Hiori in act 2.
All in all I would say :
1) Zoro
2) Sanji
3) Usopp surprisingly, mainly because of Dressrosa.
4)Franky, never stands out much but solid all around, he doesn't have a bad arc
5)Brook one time wonder in WCI but that can only carry him so far
6)Nami, the lack of focus on navigation post time skip really hurts her relevance
7)Robin, her only contribution was taking down Black Maria
8)Chopper, just healing people in the background really.