It could be the First Hokage, Hashirama. Naruto would be amazed by his powerful Wood - Style jutsu and his ability to create the village. He could learn about the original ideals behind the Hidden Leaf from Hashirama.
One popular 'Naruto became Hokage' fanfiction is 'The Hokage's Legacy'. In this story, Naruto not only becomes Hokage but also has to face new and unexpected threats to the village. Another great one is 'Naruto: Hokage's Ascension' which focuses on Naruto's journey in the early days of his Hokage -ship, dealing with political intrigue within the village.
Shikamaru is another possibility. He is known for his strategic mind. As Hokage, he could use his intelligence to make wise decisions for the village. He may not have the brute strength of Naruto or Sasuke, but his ability to plan and analyze situations would be invaluable in leading Konoha.
His friends like Sakura and Shikamaru would surely support him. Sakura, with her medical skills, could be an important part of his regime, providing healthcare for the ninjas. Shikamaru, being intelligent, could offer strategic advice. Also, the younger generation of ninjas who have been inspired by Naruto would be his strong supporters, as they believe in his leadership and the new direction he could take the village in.
Sasuke could also be a possibility for the 6th Hokage in the fanfic. He has grown stronger over the years and his unique perspective on the ninja world could bring new ideas to the leadership of the Hidden Leaf. He might start off as a controversial choice but prove himself through his actions in protecting the village and making tough decisions.
Sasuke could be an alternative. He has strong ninja skills and a deep understanding of the ninja world. His experiences have made him grow into a very capable person, and his Sharingan gives him an edge in combat and strategic planning.
Even Naruto himself could be a subject of this 'evil Hokage' concept in fanfiction. Maybe he is possessed by some dark entity or has a major change of heart due to some extreme event. This would completely change his character and turn him into an evil Hokage, which would be a very interesting and unexpected twist.
It's highly unlikely. Naruto's world is preoccupied with real - life ninja stuff. Fanfiction and AMVs are products of our modern - day, media - savvy world. There are no computers or the Internet in Naruto's world for him to access such fan - made content.
He might be amazed. Naruto is used to his own world and seeing a fan - made interpretation like an AMV fanfiction would be like seeing a new side of his story.
Iruka could be an interesting character to include. He has always been important in Naruto's life and could provide a different perspective on the Second Hokage's story. Hinata could also be part of it. Her gentle nature could contrast with the more battle - oriented characters. And Rock Lee, with his dedication to hard work and the ninja way, could be inspired by the Second Hokage's own determination and contribute to the story in his own unique way.