(Lone wolf + close reading of canon + not mindless + chakra system + no artificial power scaling)
“You have pure darkness within you. Take over the Root, Tenshi. Konoha needs you!”
“I can help you become Hokage!”
Konoha's Hokage Advisor, elder with real power, head of Root, darkness of the ninja world: Shimura Danzo.
“Tenshi, your goal is to overpower everyone. You've gone too far.”
Konoha's Sixth Hokage, Copy Ninja, head of the Hatake clan, the ninja world's strongest equal match: Hatake Kakashi.
“Hey, guys, who gets it? I just wanted to look after my little sister and lie flat, but now they're...”
“What are you doing?!!!!”
Tenshi spread his hands, looking utterly helpless.
At the end of the Fourth Great Ninja War, Tenshi arrived at the site of the final battle.
“So you're the bastard called Madara Uchiha!!!”
The blurb doesn't do it justice. Head to the main story.
Come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on, come on.