I guess I'll add pre-madara Tobi to the mixBecause the only one that can go with Kakuzu is Hidan U_U
PS: Or possibly pre-madara Tobi, but since you exclude him...
he was obsessed by sharingan, and time when oro was in akatsuki i don't think they all gathered up very often xd first time in ages they all gathered up when snake face has alrdy left there. and to poll i go for.. itachi&nagato= they could just capture all 9 in 1 day lolz. or ^^ kakuzu&hidan=immortal and almost immortal "zombies" was always funny as hell to watch them as partnersOro and Nagato. Just to see Oro past his obsession with Sharingan and in love with Rinnegan. Which is something that always bugged me. If Oro was a member of akatsuki he must have seen Pains eyes. How come he didn't want to know more about them and in staid tried to kill itachi and then left akatsuki. it doesn't add to Oro's way of doing things. plot hole maybe?
:/ you are saying Orochimaru was part of an organization but he never met the leader? unlikely. I think it's more likely Kishi hadn't thought of this and chose to ignore the plot hole rather than giving some made up excuse along the way.he was obsessed by sharingan, and time when oro was in akatsuki i don't think they all gathered up very often xd first time in ages they all gathered up when snake face has alrdy left there. and to poll i go for.. itachi&nagato= they could just capture all 9 in 1 day lolz. or ^^ kakuzu&hidan=immortal and almost immortal "zombies" was always funny as hell to watch them as partners:d i had to say this.. they are just perfect tag-team!