It could also be Makarov. As the guild master, he has a sense of responsibility towards all his guild members. He might have some secret magic or knowledge that could be used to revive Gajeel in a moment of great need for the guild.
One interesting plot twist could be that when Gajeel is revived, he has some new and unexpected magical powers. Maybe he can now control a different type of magic that was previously unknown to him and his allies. This new power could put him in a unique position within the story's power dynamics.
Maybe an old enemy who was thought to be defeated but has somehow returned stronger. Orochimaru could be a possibility. He was always obsessed with power and immortality. If Naruto is revived, Orochimaru might see it as an opportunity to study Naruto's new state of being (since he was revived) and use that knowledge for his own dark purposes.
Yes, there might be such fanfics in the Fairy Tail fanfic community. However, not all of them are easy to find. Some fanfic platforms might have specific search filters that can help you locate them.
Gajeel would probably become more gentle and caring towards Levy. Levy, in turn, would trust Gajeel even more with her life and the life of their unborn child. Their relationship would shift from just being a couple in love to soon - to - be parents, which means more responsibility and a deeper bond.
An unexpected ally could be an old enemy from his past. Maybe a Hollow that he once fought and defeated now sees a greater threat in the situation after Ichigo's revival and decides to team up with him. For example, the Hollow might have information about the new forces that are emerging since Ichigo's return and offers to share that in exchange for some form of protection or mutual benefit.
I haven't actually read this fanfiction yet. But if Naruto is revived in it, there could be so many interesting plot twists. Maybe he comes back with new powers or a different perspective on the ninja world. It might also explore how his return affects his relationships with his friends and the village.
One great Levy and Gajeel fanfiction is 'A Bond Beyond Words'. It beautifully explores their relationship growth from rivals to lovers. The author does an amazing job of capturing Levy's intelligence and Gajeel's rough - yet - tender side.
Yes, there are several fanfictions where Minato is revived. In many of these stories, it often changes the course of the Naruto universe significantly. His revival can lead to different interactions with Naruto, and he might use his skills and knowledge to help Naruto in new ways, such as teaching him more about the Uzumaki clan secrets or providing unique combat strategies against new enemies.
One can expect a lot of emotional moments. His friends would be overjoyed to see Naruto back. And Naruto himself would probably be a bit disoriented at first, having to come to terms with being alive again. It could also involve some sort of quest that only Naruto can undertake now that he's revived.