Tsunade could also be a possibility. She is a strong and respected figure in the village. Adopting Naruto would be like her taking on a protege in a more personal way. She could teach Naruto about leadership and medical ninjutsu, which would give Naruto new skills. And her tough - love approach would be a contrast to Naruto's more carefree nature at times.
An older and retired ninja, like Jiraiya's former teammate who we don't know much about. This ninja could have retired from the active ninja life but sees something special in Naruto. They could live on the outskirts of the village and teach Naruto ancient and forgotten ninja arts. This would be a way for Naruto to gain unique abilities and also learn from someone with a different perspective on the ninja world.
The Weasleys could be potential adoptive parents. They already have a big, loving family, and they are very kind - hearted. They could take Harry in and he would fit right in with their rambunctious family dynamic. He would grow up with Ron as his brother in a more official sense, and Molly Weasley would surely dote on him.
There could be an older wizard or witch who has no children of their own. They see Harry as a chance to pass on their knowledge and wisdom. They might be a bit of an outcast in the wizarding community but have a lot to offer Harry in terms of magical education and life experience.
The Weasleys could be likely adoptive parents. They already have a big family and a warm, loving home. They understand the importance of family and would surely welcome Harry with open arms. They could give Harry the sense of a proper family that he has always longed for.
It could be Might Guy. He already has a strong bond with Rock Lee, almost like a father - son relationship. So it would make sense for him to officially adopt Rock Lee. He would continue to train Lee in his own unique and intense way, and they would have many more adventures together.
A loving couple could be the potential adopters. They might be a married couple who have always wanted to have a child but couldn't have one biologically. So, they decide to adopt Bella. They have a stable home and enough resources to take care of her.
Sakura could be a great guardian in a 'naruto guardian fanfic'. She has strong medical skills and combat abilities. She could use her medical ninjutsu to heal Naruto when he is injured in battles and also fight alongside him, protecting him from harm.
In addition to Naruto and Pakura, Hinata could be involved. She has a crush on Naruto, and with him being adopted by Pakura, she might be shy yet eager to interact with him in this new context. Rock Lee could also be in the story. He is always looking for strong opponents and new training methods. Naruto's new situation under Pakura's care might intrigue him, and he could try to learn from Naruto's new experiences. And of course, Orochimaru might be interested in Naruto's adoption as well, seeing it as a way to potentially get closer to Naruto for his own devious plans.
It could be Orochimaru. He's always been interested in experimenting and causing chaos. Maybe he wants to use Naruto's parents' forgetfulness as a way to study the Uzumaki clan's mental state or something related to their chakra. He might see Naruto's vulnerability in this situation as an opportunity to get closer to his goals.
An old, retired hero. This hero, having seen Sonic's deeds, decides to take him under his wing. He could teach Sonic about the true meaning of heroism, based on his own experiences. It would be a story of passing on the torch, with Sonic learning valuable lessons from someone who has been through many battles and emerged victorious.
Well, obviously Naruto and Hinata as Shinachiku's parents. His friends could be the children of other Naruto characters, like Boruto's friends. Maybe the son or daughter of Shikamaru could be his strategic partner in some adventures. Also, the new generation of the Akatsuki could be potential villains in the fanfic.