Kurenai Yuhi. She's a great kunoichi but isn't as prominent in the later parts of the series. In a fanfic, she could be a mentor to the female shinobi in the village. She could also use her genjutsu skills to help Naruto in battles against enemies who are strong in physical combat but weak against genjutsu. This would show a different side of her abilities and give her more importance in the story.
Rock Lee. He's often overshadowed by the main characters but he has a lot of potential. In a fanfic, he could be Naruto's right - hand man in training the new generation of shinobi. His unique fighting style and determination could inspire the young ones and he could also be a great help in protecting the village during tough times.
A really interesting plot could be Naruto traveling back in time to the era before he was born. He could meet his parents and other important figures in the village's history. This would give him a chance to understand the roots of the village better and also learn some new jutsu or strategies that he could bring back to his own time to make the Hidden Leaf even stronger as a Hokage.
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.
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 also be a candidate in some fanfics. He has his own set of powerful abilities and a complex personality. A story could be written where he decides to take on the role of Hokage at a young age to bring about change in the village in his own way, perhaps using his Sharingan and new techniques he develops.
In these fanfics, Kakashi could be a popular character. He was Naruto's teacher and now he could be an advisor to Naruto as Hokage. His wisdom and experience would be invaluable. And of course, characters like Shikamaru, who is known for his intelligence, could also be important in helping Naruto govern the village.
Obviously, the new Hokage would be one of the main characters. It could be a character we already know like Naruto's son, who has inherited his father's determination and strength.
Sasuke could be a great choice. He has powerful abilities and a complex past. His experience as an avenger and then his redemption arc gives him a lot of depth. He has also learned from Naruto and has a different perspective on leadership. He could bring a more strict and strategic approach to being Hokage compared to Naruto.
It depends on the specific plot of the fanfic. Sometimes he could be on a secret mission, in a hidden village, or facing a new challenge in an unknown location.
Obviously, Naruto Uzumaki himself is the central character. His wife, Hinata, is also very important as she is part of his family and would play a major role in family - related storylines, like raising their children.
In addition to the main characters like Naruto, including the new generation of shinobi such as Boruto, Sarada, and Mitsuki would be great. They represent the future of Konoha and can have their own storylines within the fanfic. Shikamaru, as Naruto's advisor, is also a must - include character. His intelligence and strategic thinking can add a lot to the story.