Board Thread:Theories and Speculation/@comment-28300173-20161004230450/@comment-2043993-20161008141544

Nagato, taking one of Hinata's byakugan after defeating her (Hamura chakra) and Naruto, then implanting the kyubi into himself, advancing to perfect jinchuriki, gaining knowledge and then mastery of senjutsu on the way.

alternative: Kabuto: just by keeping implanting everyones dna into himself. Kakuzu: taking the hearts of the five kage. Sasori: human puppet of every kage level, jinchuriki and kekkei genkai user in the series.