Nagato rapes, especially if he can use his six paths of pain. I mean come on, really? They have the Rinnegan for crying out loud, and Pain's almighty push beats any ninja technique seen except Rasenshuriken and Sage of the Six Paths Creation of all things (AND the FRICKIN MOON) technique. I made a thread of Akuma vs Naruto and peeps were all about Akuma destroying an island, when Sage of the Six Paths MADE THE MOON AND LOCKED THE MOST POWERFUL DEMON OF THE NINJA WORLD INSIDE! Naruto must be close to Sage's level because Kabuto noted that Madara is close to Sage in power, and Madara is about equal to first hokage, who is weaker than third hokage, and Naruto is way stronger than Orochimaru who beat the third....... don't know how 1st beat/hurt Madara, because Madara>>>>>>>>>>>>>> Orochimaru, who is stronger than 1st and 2nd hokage by default since he controls them. I bet 1st hokage had a lot of help. Anyway Itachi or any Akatsuki member >>> Orochimaru who feared even confronting weaker members or atleast tried to avoid it. In terms of Akatsuki higherarchy:
Tobi > Kabuto > Madara > Pain > Yahiko > Itachi > Kisame > Sasori > Deidara > Zetsu > Kakuzu > Hidan > Konan.
The only one that may be a little off is Zetsu because everyone always underestimates him. 4th Raikage failed in killing him, whether he tried hard or not. Konan isn't strong. She's just packing a lot of paper bombs.
Hope I was helpful.