If I look at the last decade/10 years (which is already generous tbh):
3: Chopper, Jimbo, Usopp, Franky
2: Brook, Robin, Zoro
1: Luffy, Sanji, Nami
Oda refuses to give Usopp character moments (probably because he has something planned in his mind for elbaf). Like even this arc the one from the coward trio that mustered the courage to first declare to defend robin is Nami, insane. Not to talk about the train wreck that was Wano for Usopp
Infact Wano soured me on most strawhats with how they were handled beside Sanji Robin and Nami. Oda seems to have written the arc without any idea what to do with them. Alot of the plots go nowhere to a comedical degree and most fights are filler
Usopp later doesn't even apologize to Toko personally after he tricked her with toad oil I'm having war flashbacks
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Edit: Also to make it clear this is not a list how much I like this characters (I don't like luffy that much for example, even before wano), just how much oda focuses and gives a fug