This is how i rank them
1. Luffy is the strongest as the captain, part of the worst generation, with potential to surpass Roger, usually fighting the strongest opponents
2. Zoro is the strongest as the informal right hand man/vice-captain of the crew, part of the worst generation, potential to surpass Mihawk/Rayleigh, usually facing the second strongest opponents
3. Sanji is the third strongest as the third part of the monster trio of the crew, usually facing the third strongest foes
4. Franky is the fourth strongest, usually having the main fights among the middle trio, with great destructive power and durability
5. Robin is the fifth strongest, usually compared to Franky but with speciality relying on great used of her devil fruit(for grab, clones, etc) in combo with her high level of reaction speed. I think she can beat Franky in a fight, but Franky is overall stronger
6. Brook is the sixth strongest, as part of the middle trio, the fastest of them in terms of movement or attacking speed, but usually gets the short end of the stick compared to them
7. Chopper is the seventh strongest. Depending on his state he can go from weak trio to close to mid trio in my opinion, especially now that he control monster form(albeit the timelimit of the mode remains)
8. Nami/Usopp can't really seperate these two since they are often paralleled with one another. Nami has the advantage to have already shown the ability to defeat Usopp in a fight(albeit when he was running away), plus the fact that Oda apparently said Usopp will always be the weakest(but how relevant it is at the moment?), but on the other side Nami is nothing without Usopp since he is the one who created her weapon in the first place, he also displayed much greater endurance(he could take Caesar's attack that Nami thought could have killed her if not Sanji's body for example)
If Jinbei joins by the Cake Island arc, i think he'd be either be Sanji level or a little above(so maybe number3) judging by their comparable portrayal in fishmen island
1. Luffy is the strongest as the captain, part of the worst generation, with potential to surpass Roger, usually fighting the strongest opponents
2. Zoro is the strongest as the informal right hand man/vice-captain of the crew, part of the worst generation, potential to surpass Mihawk/Rayleigh, usually facing the second strongest opponents
3. Sanji is the third strongest as the third part of the monster trio of the crew, usually facing the third strongest foes
4. Franky is the fourth strongest, usually having the main fights among the middle trio, with great destructive power and durability
5. Robin is the fifth strongest, usually compared to Franky but with speciality relying on great used of her devil fruit(for grab, clones, etc) in combo with her high level of reaction speed. I think she can beat Franky in a fight, but Franky is overall stronger
6. Brook is the sixth strongest, as part of the middle trio, the fastest of them in terms of movement or attacking speed, but usually gets the short end of the stick compared to them
7. Chopper is the seventh strongest. Depending on his state he can go from weak trio to close to mid trio in my opinion, especially now that he control monster form(albeit the timelimit of the mode remains)
8. Nami/Usopp can't really seperate these two since they are often paralleled with one another. Nami has the advantage to have already shown the ability to defeat Usopp in a fight(albeit when he was running away), plus the fact that Oda apparently said Usopp will always be the weakest(but how relevant it is at the moment?), but on the other side Nami is nothing without Usopp since he is the one who created her weapon in the first place, he also displayed much greater endurance(he could take Caesar's attack that Nami thought could have killed her if not Sanji's body for example)
If Jinbei joins by the Cake Island arc, i think he'd be either be Sanji level or a little above(so maybe number3) judging by their comparable portrayal in fishmen island