Guys, you should understand something.
Have you watched Tokyo revengers?
It's like you see Luffy as Mikey, the Commander, and Zoro as Draken, the vice commander and Number 2, with Sanji being Baji, the 1st division commander.
I don't think it's like that.
Luffy Is the Commander, Zoro Is the Number 2 and Sanji the Number 3.
Being a Number 3 it's better than being a First Commander.