Tobi, if you've read the manga it's pretty obvious.
haha!!! nobody likes konan. >=]
tobi is the strongest, but i voted for itachi, hes my favourite, go Itachi!!
Screw Tobi/Madara! Pein is the strongest!
Itachi is strongest. Sorry Deidei - kun! ;~;
Pein never lost a fight, he's the strongest!
Pein is the strongest thats y he's the leader