Most Powerful Ninja Throughout All Media?

I've seen threads like this for different subjects but between American, European and Asian Videogames/TV/Comics/Movies/Anime/Ect.
The concept of "Ninja" has become a very popular concept.
The characters who are called ninja range from being the more of a swordsman than a stealthy spy such as Jubei Kibagami from Ninja Scroll or the over-powered hard-stealthy ninja's from naruto to the actually stealthy Rikimaru from Tenchu Series.
So just out of my own interest in the subject, I'm curious to see who you all believe is the strongest "Ninja" ever. The term ninja is pretty open but there must be some explanation of why you're character is a ninja if it's not obvious, even if the character doesn't use the term themselves.
I don't think there's anyone omnipotents who claim to be Ninja so that's not a problem.
While he's not my favorite Ninja, the Fourth Hokage from Naruto is the most powerful ninja I know of.
Just want to hear your opinions...
The concept of "Ninja" has become a very popular concept.
The characters who are called ninja range from being the more of a swordsman than a stealthy spy such as Jubei Kibagami from Ninja Scroll or the over-powered hard-stealthy ninja's from naruto to the actually stealthy Rikimaru from Tenchu Series.
So just out of my own interest in the subject, I'm curious to see who you all believe is the strongest "Ninja" ever. The term ninja is pretty open but there must be some explanation of why you're character is a ninja if it's not obvious, even if the character doesn't use the term themselves.
I don't think there's anyone omnipotents who claim to be Ninja so that's not a problem.
While he's not my favorite Ninja, the Fourth Hokage from Naruto is the most powerful ninja I know of.
Just want to hear your opinions...