Naruto has quite a lot of powerful filler characters, many whom are Kage level imo. Naruto won fights against these characters because of PIS only.
Which one among all these characters is the strongest? Don't include Naruto movie characters (just naruto and shippuden)
* Seimei (weapon master)
* Natsuhi (meteorite energy user)
* Fuka (all element user)
* Yakumo (reality manipulating genjutsu)
* Renga (ice disk technique user)
* Jiga (magnetic force manipulator)
* Guren (crystal release user)
* Sora (pseudo jinchuriki of nine-tail)
* Raiga (lightning master)
If anybody whom u consider strongest filler character is missed out from the list, please mention the name and reason
why u think he/she is the strongest