Dude do you know how ridiculous you sound? Let me show you with an example if you if you don't...Edo makes him powerful, but I can't consider that tech when placing a ninja into top 10 seeing as dna has to be collected, sacrifices made and what not. By the time you use that other villages, kages, ninja etc. will take notice, and it's not gonna be a 1 vs edo army for long, but Kabuto is absurdly strong right now.
But there are still a few ppl who could easily handle him up
'Hirashin no jutsu and transportation barrier make Minato powerful, but I can't consider that tech when placing someone in the top ten seeing as special shaped Kunai have to be created, seals need to be drawn on paper tags, and then the paper tags have to be attached to the handle of those 200 kunai. By the time you've done that other Villages, Kages, etc will have taken notice.'
That is exactly what you sound, used a different character just to make a point. I could also make other examples, ie. Kankuro/chiyo/Sasori with prep time to make puppets, whcih probably takes even longer then edo to make.
Just because a jutsu takes long to set up doesn't mean it takes long to use in battle, Kabuto was easily able to summon like 5 Akatsuki members right in front of Tobi in no time at all, stop making lame excuses and accept reality, Kabuto is the strongest, period!.