That made me think.
None of Naruto's peers will challenge him to Hokage. This was already the case when he was a kid. They teased him, yeah, but no one was really there to stop him (by being a better candidate). It's even more out of the question now that he's crazy strong..
If the position of Hokage was decided merely from winning duels, Naruto-the-Pain-killer could probably take it on right now.