Perhaps the plot revolves around a situation where Hogwarts is in a different kind of danger. Not just from Voldemort - like threats, but something more internal. For example, a curse that is slowly destroying the school, and Harry is the only one who can sense it. He then has to go on a quest to find the origin of the curse and a way to stop it, all while dealing with the disbelief of some of his friends and teachers. It would really put him in the position of a hero in a unique way.
It could be about Harry facing a new, extremely powerful dark wizard that no one else seems to be able to handle. So, he has to step up even more than he did in the original series and become a true hero. Maybe he has to find a new kind of magic or form an unlikely alliance to defeat this new threat.
One possible plot could be that a beloved hero character, perhaps someone inspired by the original Harry Potter series, sacrifices themselves to save the wizarding world from a new and powerful dark force. This selfless act would be in line with the themes of heroism in the original series.
One great place to find 'In Need of a Hero' Harry Potter fanfiction is on Fanfiction.net. It has a vast collection of fan - created stories. You can simply search for the title or relevant keywords like 'Harry Potter' and 'In Need of a Hero' in the search bar, and it'll show you a list of available fics. Another option is Archive of Our Own (AO3). It also has a great tagging system which can help you narrow down your search to find the exact fanfiction you're looking for.
One possible plot could be that a wizard has the ability to 'rent a hero' from a magical service. Harry Potter himself could be rented out to help a young, struggling wizard face a new dark threat in the wizarding world. He could use his skills and experiences to train this wizard and together they could uncover a plot by a group of Death Eaters who are trying to revive Voldemort in a new way.
The plot could involve a situation where a new form of dark magic is unleashed in the wizarding world, which spreads like wildfire and causes destruction similar to 911. The Ministry of Magic is caught off - guard. Hermione, with her vast knowledge, starts researching a way to counter this magic. Meanwhile, Ron and Harry lead the effort to protect the civilians. They set up shelters in places like the Room of Requirement and use Patronuses to guide people to safety. As they dig deeper, they discover that this dark magic was a planned attack by a long - hidden dark wizard group who wants to take over the wizarding world.
One possible plot could involve a group of spiders that have been enchanted by a dark wizard. These spiders start attacking Hogwarts students. Harry, along with his friends Hermione and Ron, would need to find the source of the enchantment and break it to save the school. They might have to explore the Forbidden Forest more deeply and face their fear of spiders to do so. This would combine the elements of adventure, mystery, and the existing spider lore from the Harry Potter series.
The plot could involve Catwoman being drawn into the wizarding world by some mysterious magical force. She might start out as an outsider, trying to figure out how things work. Maybe she gets involved in a plot to steal a powerful magical object, but along the way, she starts to have a change of heart and decides to help the good guys instead.
A plot could be that Gaster has a connection to the Forbidden Forest in Harry Potter. He might be the source of some of the strange and dangerous creatures there. As Harry and his friends explore the forest more, they start to notice Gaster's influence. Gaster could also be using the forest as a way to try and get back to his own world or to gain power in the Harry Potter universe. This would lead to a series of adventures and battles as the characters try to either stop Gaster or understand his motives.
In this fanfiction, the plot could center around Harry Potter arriving in Tamriel during a time of great unrest. He discovers that there are parallels between the magical hierarchies in Tamriel and Hogwarts. He could get involved in the political struggles of the various factions in Tamriel while also trying to find a way back home. Along the way, he might teach some of the Tamriel mages about some of the more advanced magic he learned at Hogwarts, like Patronus Charms, and in return, learn about Tamriel's unique magical artifacts and how to use them.
Maybe Harry could be the host of the Kyuubi's power in the wizarding world. He would have to deal with not only the threats from Voldemort but also the power of the Kyuubi inside him. His friends might be both amazed and a bit scared of this new power source.
Well, it could be about Harry Potter somehow taking on the characteristics or abilities of Alastor Moody. Maybe he has to pretend to be Moody for a mission and in the process, he learns a lot about Moody's past and his way of dealing with dark wizards.