If that were really true though then Stark would be number 8 and Szayel would 12.
Right now Im going for all three are incredibly close in power so they are constantly challenging the others authority. Stark could be number one and just not care which is why lilinette was so pissed. Halibel on the other hand could be number one but at the moment doesn't see the need to take charge.
Barragan saying "got any problems with that" shows that its not a given that he's number one. Rather he believes he should be like Nnoitra. I'd say he is more likely to be three. IMO