You could also consider a team of Orochimaru (in a redeemed form for the fanfic), Kabuto (also redeemed), and Suigetsu. Orochimaru's vast knowledge of jutsu, Kabuto's medical and combat skills, and Suigetsu's water - based abilities and swordsmanship would create an interesting and powerful team.
Maybe a team made up of Gaara, Choji, and Fuu (from the Hidden Waterfall Village). Gaara's sand control, Choji's size - increasing and strength - enhancing techniques, and Fuu's unique jutsu could make for a really unique and fun team to write about in a fanfiction.
How about a team with Kiba, Neji, and Karin? Kiba with Akamaru has great tracking abilities, Neji can use his Byakugan for perception and defense, and Karin has her unique sensing abilities which could be useful in various missions.
You might consider adding Tenten to the team. She has a vast knowledge of weapons which could be handy in various missions. And Kiba, with Akamaru by his side, could offer enhanced senses and tracking abilities for the Anbu team.
One possibility could be Boruto as a new - age Naruto - like character. Sarada, with her Sharingan and Uchiha heritage, could be another member, similar to Sasuke. And for the third member, maybe a new character like a young ninja from a small and previously unrecognized clan who has a unique chakra ability. This new character could bring in fresh dynamics to the team.
Suigetsu would be a great fit. He has his own unique abilities and his friendship with Karin could bring some interesting dynamics. His water - based jutsu would complement Naruto's and Karin's skills in different ways.
It could be some of the younger ninjas from the village who look up to Naruto. Maybe a young genin who has a special ability with earth jutsu, and another who is really good at stealth but lacks confidence. Naruto would then help them grow.
Tenten could be a member. She is already good with various weapons. Naruto could train her to combine her weapon skills with chakra control for more powerful attacks. Hinata might also be in the team. Given her gentle nature and Byakugan abilities, Naruto could train her to be more assertive in combat while enhancing her use of the Byakugan.
Typically, in fanfiction, Naruto is a given. Anko is there as well. Other members could include characters like Shikamaru, who would bring his strategic thinking to the team. Maybe Sakura could also be part of it, adding her medical skills. Another possible member could be Kiba with his unique tracking abilities and his dog Akamaru.
Typically, in Naruto, Team 1 consists of Sasuke, Naruto, and Sakura. In fanfics, they are often the main characters of Team 1, but sometimes fanfic authors might add new characters or change the dynamics a bit.
One possible member could be a young ninja with a natural talent for earth - style jutsu. He's a bit of a loner at first but slowly warms up to the team. Another member could be a girl who is really good at tracking and has a sharp mind. And then there might be a Genin who is from a family known for their medical ninjutsu skills, just like Sakura, and they look up to her a great deal.
Maybe a brilliant biologist who has developed a way to enhance human physical abilities through genetic manipulation. A former S.H.I.E.L.D. agent who has inside knowledge of all kinds of secret operations and is an expert in combat and espionage. Also, a young inventor from a small town who has created some amazing but unrefined gadgets that catch Stark's attention.
It's possible that some foreign ninjas could be members. People from the Hidden Cloud Village or the Hidden Mist Village who have heard about Naruto's club and are intrigued by its purpose. They would bring in different fighting styles and techniques, which would enrich the club's knowledge base. And there could be some non - ninja members as well. Maybe a local merchant who provides resources for the club in exchange for protection or a young orphan who Naruto takes under his wing and includes in the club to give them a sense of family and purpose.