Itachi beats Nagato and Sasuke for those people who dont know. Sasuke has better control of Amaratsu only. His sasuno'o is weaker and tsyukomi too. Kirin has no effect to his Yata Mirror. Itachi>Nagato. He beated NAGATO even when Nagato was healthy. Nagato is badazz but Itachi is still stronger. Rinnegan>Ms I agree but Itachi>Nagato. Everyone knows the weaknesses of Rinnegan so its done for Nagato. Minato..hes like my 4th favorite character but..hes stands a dam good match for itachi but Itachi would win also. His Yata Mirror is there to back him up and his strong sword, Totsuka blade. I'm not a fanboy, if I was I would say it straight up.
nagato>itachi.
nagato has preta path shield(which i could not give you a link to because i currently only have 3 posts), which makes amaterasu,yasaka magatamas, totsuka blade, and yata shield useless. tsukyomi however is an exception, but with the distrations that itachi is going to recieve from animal path(invisible chameleon,multiheaded dog,giant ox,giant rhino, giant centipedes, and the flying bird) all nagato needs to do is get close to the busy itachi, absorb sussano/totsuka blade/yata shield with preta path and rip itachis soul using human path. i dont see itachi winning this, hes strong but he will get overwhelmed by nagato.
minato>itachi
unless itachi is edo ( which would be unfair)
all minato has to do is outlast itachi and not look at his eyes. itachi has to keep sussano up at all times or hell get ripped to pieces. minato is blindingly fast, and itachi is nowhere near his level. minato can put seals on the floor and the moment itachi accidentally walks his sussano over it, hes dead. minato would teleport inside the susanno, do a quick slash with a kunai and teleport back outside the sussano. leaving itachi dying inside his own sussano.