man, reading through this thread made me realise that a lot of people seem to be under the impression that just because u beat someone instantly means that you're on a higher level.
naruto is NOT stronger than kabuto.. kabuto got hit by the rasengan coz he was doing his cell regeneration dooby.
neways, itachi and the sannin appear to be the strongest.
jiraiya is pretty strong regardless of how perverted he is. tsunade knows how to heal people.. but that also means she knows what causes people to be in need of healing as well.. so that's quite an attribute. plus her friggin strength where she can like... punch a crater in one hit. far out. and oro.. even without arms he's scary as crap.