Well, it could be the children of his friends. For instance, Boruto could be one of his students, and Naruto could use his own father - son relationship with Boruto as a teaching tool, sharing stories of his own father to inspire Boruto. Another student could be Sarada, Sasuke's daughter. Naruto could teach her some of the skills he learned from Jiraiya, passing on that knowledge.
It's also possible that some of the orphans or less - privileged kids in the village become his students. Naruto, having been an outcast in his own childhood, would be especially sympathetic towards them. He would teach them to believe in themselves and their potential, just as he learned to do throughout his life.
It could be some young genin who were overlooked by other senseis. Maybe they have unique abilities that Naruto can help them develop.
One possibility could be the children of his friends. For example, Boruto could be one of his students. Since Naruto is now a jounin sensei, he could pass on his skills and values to the next generation, especially to Boruto who has his own set of challenges and potential as a ninja.
In the fanfiction, Naruto's new sensei could be a mysterious figure who has ties to the Sage of Six Paths. This person might have been waiting for the right time to appear and train Naruto. They could possess knowledge about the origin of chakra and how to fully unlock Naruto's power. It could also be someone who was once an enemy but has now changed their ways and wants to use their skills to train Naruto for the greater good of the ninja world.
There's a chance that Naruto's new sensei could be a self - taught ninja who has developed their own unorthodox style. This person sees Naruto's ability to think outside the box and wants to refine that in him. They could introduce Naruto to a new way of looking at chakra control and combat strategies that are completely different from what he has been taught so far.
Tenten would also be an interesting choice. She could focus on weapon - based combat training for Team 7. Since she has extensive knowledge of all kinds of weapons, she could introduce new and unique weapon techniques to the team.
One possible Jounin Sensei of Team 10 in Naruto fanfiction could be Shikamaru's father, Shikaku Nara. He was a highly intelligent shinobi and his strategic mind could be a great asset in training the members of Team 10.
In some Naruto fanfictions, Minato could potentially be Kushina's sensei. He was highly skilled and had a connection with her, so it's a plausible idea in fan - created stories.
Kurenai might be a good sensei for Naruto's different team. Her expertise in genjutsu would be valuable. She could help the team develop their skills in this area, especially if the new team members have some potential in genjutsu. Kurenai is also very perceptive, which would be great for guiding Naruto and his new teammates through difficult situations.
I think Orochimaru would be the most unexpected sensei. Usually, he's seen as a villain, but in a fanfiction, if he were to train Naruto, it would be extremely unexpected. He has a vast knowledge of jutsu, especially forbidden ones. He could teach Naruto some very powerful and unique abilities, but at the same time, Naruto would have to deal with Orochimaru's morally ambiguous nature.
Obviously, Naruto himself would be one of the main characters as he is the sensei. His students could be a group of new genin. For instance, the children of his old friends like Boruto and Sarada could be among his students.