Jinbe- As the most experienced and seasoned member of the crew he can offer many years of strength and wisdom he often takes control when the monster trio is otherwise occupied and the situation is out of Nami's depth
I'd go with
Luffy / Zoro / Nami. Of course Luffy is the captain but is not like we don't see Zoro and Nami putting some authority even over him. So I see more like a partnership where Luffy is major shareholder while Zoro and Nami are the minor ones.
Then we have Sanji, of course Luffy "puts" Sanji in charge over Nami when they separate at Dressrosa but mainly because Sanji was the one talking to him and he was the strongest and had to make sure the rest is safe.
I'd say the rest is pretty even except for Chopper and Jinbei being the lowest. Jinbei simply because he is new, Chopper simply because he is the pet/food supply