Out of them all I'd say Naruto. He has the nine tailed fox and killer bee has the eight tailed, so with each tail they are more powerful. I don't want to spoil anything so I'll just say...NARUTO!
Technically speaking, Naruto has the advantage in this group because he has wind nature chakra, which is strong against the lightning nature the other 3 have.
Raikage is stronger than Killer Bee, and other than that im not sure at this point, but considering how easily Naruto beat Pain, while Sasuke had so much trouble with Deidara, i assume Naruto is stronger than Sasuke
I think Naruto is stronger than Killer Bee but... the raikage is stronger than his brother so i think he's stronger than Naruto (but only for the time being, Naruto's sure to catch up!). And as to that comment about how killer bee is stronger becuase he can use the 8 tails cloak, the question is which person is stronger, not which bijuu. And because killer bee relies on the hachibi that alone makes Naruto, who uses his own power, stronger.
Well, Its obviously the Raikage then Killer bee then Naruto in statistics
Raikage Immence Thunde4r abilities, and also he's the only one who can control Killer Bee
Killer Bee because he can got full 8 tails without bodily harm and still be in control
Naruto - The only reason he is so powerful is because he is the main character, If he could control the full 9 tails then fair enough, he would be the strongest but he loses control, thus making it kyuubi not Naruto XD