I think the only arc where every Strawhat got a one vs one was Alabasta (technically Usopp and Chopper got a 2 vs 2 but it counts), unless you want to stretch Usopp sniping Spandam (I wouldn’t argue much with that) and Robin snapping him in two (not so much a fight).
Usopp, Chopper and Brook are the casualties here. Chopper got to show off his doctor skills with the Chopper cannon virus attack and fight Queen for a bit, so that’s okay, Brook got to solo a Number and a bunch of Gifters at the same time which is decent. And he cut Zeus in half earlier. Usopp’s been pretty dissapointing, technically beat Bao Haung but, eh, not very interesting. But he does have Elbaf coming up to be the main man.
Going forward they’ll get something, Brook taking on CP-0, some of the Strawhats maybe even taking on Big Mom again, but I don’t see any one vs one’s coming up.