Tied for 1 & 2
Pain Let's Just Face It, Tey're Both
Itachi Awsome. Why Be Too Specific?
Tied for 3rd and 4th
Kisame (Highest natural chakra and awsome sword)
Madara (haven't seen him fight much, but be fair--he is the leader)
Tied For 5th and 6th
Sasori (He's my favorite, but Kisame Pain and Itachi would win)
Kakuzu (Not my favorite, but tougher than Hidan or Deiadara)
Tied for 7th 8th and 9th
Deiadara (Special fighter, just not as much as the rest)
Hidan (Eh...)
Konan (she did almost kill Madara)
10th
Zetsu (He's neat and freakish, but nothing that very special).
But those of you saying that the younger generations surpass the old? I agree with you totaly on that subject.

Those of you giving specifics and hypothoses on the 3rd vs Sasori:
WE DIDN"T SEE THE FRIGGIN FIGHT!!! Garra's brother surpassing Sasori? Not really sure. If both were given the same puppet--ONE puppet--I'd root for Sasori, but can't really say. Gaara vs Sasori: Sorry Sasori, but probably Gaara. Now, Sasori DID take on the 3rd and win, but his iron sand was more offinsive than defensive. Gaara's using a Biju's power without the Biju, and still has what's called the "ultimate deffence."
Rock Lee is my favorite charicter, and has been since I saw him fight Gaara in middle school. Gaara is next, and has been since he fought Rock Lee. Gaara's gotten stronger, cooler (in the calm sense of the word, not the appealing sence), more accepted and renowned by his village, and surpased his father. Sasori has always been my favorite Akautski member, wich ticked me off since he was the FIRST to die at both the BEGGINING of shippuden AND THE FRIGGIN EDO TENSEI!!!!!!!! (screams loudly and fires a pistol five times in the air). But in the end, my opinion on the victor leans a little bit more twoards Gaara.