Well the most stable Hokage ever was the 3rd.
As much as Naruto would not die easily, he is not mature enough to be a Kage. Yes, I have seen how mature he has become when he returned from Myobokuzan, but still, to rebuild an entire village you need to have an experienced ninja leading them, that the villagers trust. And yes, I know that the villages will worship him after he pushes Pain away. But Kishi won't make him Hokage that soon I think. Remember, his task of saving Sasuke is not complete yet, and I believe (as much as I hate it) that he won't agree to be Hokage until he settles his problems with Sasuke.
Have you thought that Kishi can just bring a travelling Konoha Ninja out of nowhere? Like he did with Tsunade? Remeber when the Third died (*cries*), Tsunade's character just showed up out of nowhere to become the 5th.
Well if Kakashi will indeed find a new power from his father, as I have noticed some members believe that, maybe he could become Hokage. And remember Jiraiya and Tsunade's conversation, saying that he would most likely be the next to lead Konoha. Maybe he could become a stable Hokage, he still has Naruto in the village, and Kakashi is a guy that would know how to manage Naruto's power for Konoha's benefit. Even if Konoha's more vulnerable than ever now.
Naruto becoming Hokage will only be seen at the end. Not just yet, it's too soon.