Who in the strawhat crew can beat these East Blue pirates?

Current Strawhats. Nami and Ussop get an hour prep for each battle. Battles are one on one.

1) Buggy.
2) Hachi.
3) Kuro.
4) Don Krieg.
5) Aarlong.

I'd say everyone except Usopp...maybe Nami...

They all clear it.

I don't think so. Neither Nami or Usopp have anywhere near the durability of the rest of Strawhat, though I bet Nami'd have an easier time against Arlong than Usopp would.

Usopp with 1 hour of prep will clear it

Nico Robin

Witness the horror:

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Usopps durability should never be called into question....

Well, he can be injured, sure, but that's no guarantee you're gonna put him down.

Hmm...I suppose. I mean he has taken hits from most of the series big hitters and survived...

Usopp also gave Luffy a run for his money when he had prep