Yes, there might be some out there. Fanfiction websites often have a wide variety of works. You could try searching on platforms like FanFiction.net or Archive of Our Own. Just be aware that the quality and nature of such fanfictions can vary greatly.
Kabuto is also common. He was Orochimaru's right - hand man. In fanfiction, he could be used to either further Orochimaru's plans against Naruto or he could have a change of heart and help Naruto against Orochimaru. His medical skills and knowledge of Orochimaru's secrets make him an interesting addition to the story.
Danzo could be a main antagonist. He might see Orochimaru's interest in Naruto as a threat to his own plans for Konoha. He could try to eliminate Naruto or use him as a pawn against Orochimaru, all while hiding his true intentions from the rest of the village.
In some Orochimaru lemon fanfic, he might be portrayed as having a more seductive or alluring side. However, this is a very unorthodox view compared to his original character in the Naruto series. His intelligence and cunning nature might still be emphasized, but in a more sexually charged context which is not really in line with the official Naruto story.
Hermione could be one of the main characters. She might be suspicious of Orochimaru's teachings and try to convince Harry that it's wrong. She would be constantly researching about Orochimaru and the type of magic he's teaching Harry to prove her point.
Yes. A Naruto OC who is a good Orochimaru can bring a fresh perspective. It might explore Orochimaru's character in a new light, showing his potential for good that was not fully explored in the original series. The OC could interact with Orochimaru in ways that make the story engaging and different from the typical Naruto plotlines.
Kabuto could also be an interesting pairing. Since Kabuto was Orochimaru's loyal follower, fanfiction could delve into their dynamic. Maybe there could be a story where Kabuto has to make a choice between his loyalty to Orochimaru and his own sense of right and wrong, especially as Orochimaru's actions become more extreme.
Well, Naruto himself is a popular choice for pairing. Their contrasting natures make for an interesting dynamic. Naruto's positive attitude and determination can either influence the 'Orochimaru - like' character for the better or clash in a big way. Sasuke is also a likely candidate. Given Sasuke's own journey into the darker aspects of power - seeking, he can have a more nuanced relationship with the character similar to Orochimaru. Another one could be Kakashi. Kakashi, with his experience and wisdom, can act as a mentor or a moral compass to the 'Orochimaru - like' character, creating a relationship full of tension and growth potential.
Well, one could expect a lot of character development for Orochimaru. Maybe he has to face his new role as a soon - to - be - father and deal with his past self that was more focused on power and experimentation. The plot could also involve how his wife copes with the pregnancy, perhaps facing some threats related to Orochimaru's enemies.
Another potential antagonist could be an enemy that Orochimaru and Sakura face together during her training. This enemy might have a vendetta against Orochimaru and see Sakura as an extension of him. So while Orochimaru is training Sakura, this new enemy could be the one causing the most immediate problems and danger for them both.