I can't agree with you that Itachi is stronger than Obito and Nagato. Yeah, he's stronger than anyone else, but he can't defeat these two. Obito with Rinnegan and Kamui spam will be far too much, he can warp Itachi in the Kamui dimension, and then what? How will Itachi get out? The only person in the manga to avoid Kamui teleportation was Minato, thanks to his Hiraishin. There's no way Itachi can counter it. Also, about Nagato. Itachi had the support of Naruto and Bee, also he was an Edo Tensei. If he was alive, he would never use Susanoo that much, because of his sickness. This aside, he would never be able to destroy the Chibaku Tensei with his Yasaka no Magatama, without Bee's Bijuu Dama and Naruto's Rasen-Shuriken. Perhaps there's a silly chance of Itachi defeating Obito if he finds a counter for his Kamui, but there's no way for him to beat Nagato on one-on-one, he's the strongest Rinnegan user afterall...itachi proofed to us that he's strongest in this organisation ..
This is explanation why he's strongest and why he should lead akatsuki and I believe even in solo match , itachi can solo any member easily !
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I will go quick through them and I will provide good explanation why he is strongest akatsuki member :stfu:
1) deidara: he's so weak againat genjutsu beside itachi already soloed him easily
In matter fact , itachi was playing with him .
2) hidan:his immortality will not help him to defeat the solo king.
Amatarsu is more enough to make hidan wish that he's not immortal .
3) kakuzu: he's so experience in fight and he's dangerous ninja too.
Susanoo and totsuko blade with yata mirror will be itachi big advantage since kakuzu has no counter to it.
I believe itachi can defeat him anytime but with med to high difficulties.
4) sasori: just come on !! He lost to sakura so why I should put him with solo king level ??
Itachi can end him within sec ..
5) zetsu: he's so weak and he's no match !!
Zetsu definitely will run away if he knew that his opponent will be the solo king uchiha itachi.
6)konan: she's fodder comparing to itachi .
Genjutsu and she's gone .
7) kisame: he is the only one who can cause itachi the troubles.
He knew itachi ability so well but itachi will defeat him with very high difficulties.
8) obito: with only one MS , he is no really threat to itachi the solo king.
Obito already admitted that itachi could kill him anytime and that's end of discussion.
9) nagato:honestly I never liked nagato! this dude without his 6 paths is totally useless.
He hide behind mountain inside cave like coward and controlling dead body by his eyes !!
Itachi fought him and defeated him within few sec ..
Amatarsu + totsuko blade = nagato's end !! (end of discussion)