Theres alot of good shinobi in the world of Naruto. U guys say SOT6P, the 1st hokage, 4 hokage, Madara, but honestly i never seen them fight. With my experience of fighting i can say some shinobi's get paired up wrong and at times it becomes a handicap match 2 or 3 vs. 1. I was able to beat ppl a foot taller them me and stronger but wen put with someone my same height (5'4" 165) , i had problems. lol Its like Bruce Lee.. some say his the best fighter that ever lived, in the naruto world he would be the 1st hokage or SOT6P, but i only heard storys of him. I wouldnt know how he would do with Jet-Lee, Jackie Chan, Tommy Jaa, Steven Seigar... (J/K on him lol)
Just because a Shinobi is dead doesnt mean he wasn't good. Its like Nagato, the best Doujutsu, great skills and tech. Hands down i know his the best, shinobis like Saratobi, that dont get the credit he decerves.
But in my opinion my fav and the best was Sasori. Converted his own body into a puppet, which gives him eternal life and allows him to control hundreds of puppets at once and even the former kazekage. Each weapon in his puppets had a poison that would cause extreme pain to the inflicted until they die. A fast and strong ninja.
Witch one is ur fav??