One possible plot could be that Harry has to face his fear of Vernon in a very public and unexpected way. Maybe during a school event at Hogwarts, the boggart appears as Vernon and starts to humiliate Harry in front of his friends and classmates. This would force Harry to confront his past traumas related to living with the Dursleys and Vernon's cruel treatment of him.
Another way Harry could deal with it is by surrounding himself with his friends. His friends could offer their support and encouragement. Together, they could create a sort of protective shield around Harry, making the boggart - Vernon less intimidating. Harry would then realize that he is not alone in facing his fears and that he has a support system that the real - life Harry didn't have when he was living with the Dursleys.
Well, in some fanfics, Voldemort might have his Death Eaters spying on the Dursleys. So they could've reported Harry's location to him. Another possibility is that Voldemort has some sort of dark magic tracking device on Harry that led him there.
Obviously, Harry Vernon is a main character. But often, there are other characters created specifically for the fanfic or borrowed from the original source material if it's related to a known franchise. For example, if it's in a magical - themed fanfic, there could be a wise old wizard who guides Harry Vernon on his journey. Or a young sidekick who accompanies him in his adventures.
This is a very disturbing and inappropriate topic. Fanfic should not involve such non - consensual and immoral content. There are many positive and ethical fanfics in the Harry Potter fandom that focus on friendship, adventure, and character growth.
In some fanfictions, Harry might cope by finding solace in his friends at Hogwarts. He could talk to Hermione and Ron about what Vernon does, and their support gives him strength. For example, they might encourage him to focus on his magic studies as an escape from the Dursley's household.
In Harry Potter fanfic, boggart scenarios can be really creative. Consider a boggart that reflects a character's fear of failure. For example, Draco's boggart could be him failing to uphold his family's reputation. This would play into his insecurities. Then there could be a boggart that is related to a character's secret desires. Maybe Cho's boggart is Cedric coming back but not loving her anymore, which ties into her unresolved feelings about him. And for Seamus, his boggart might be not being able to perform magic at all, which is a fundamental part of his identity as a wizard.
Maybe Vernon is jealous of Harry's magical abilities. He might see Harry as a threat to his 'normal' family image. Also, Vernon has always been a bully at heart and Harry, being an easy target in his house, becomes the victim of his pent - up anger.
Well, it depends on how you define 'good'. There could be some out there. Fanfic writers are very creative and might have come up with scenarios where Vernon has a change of heart and develops some sort of positive feeling towards Harry. But you'll have to dig through a lot of fanfic to find the really great ones. It could involve Vernon seeing Harry in a new light, like realizing his courage or something like that.
One good Harry Vernon fanfic could be 'Harry Vernon's Magical Adventure'. It might involve Harry Vernon going on a journey through a magical realm filled with unique creatures and challenges. Another could be 'The Secret of Harry Vernon' which perhaps uncovers some hidden aspect of his character or family history. There could also be 'Harry Vernon and the Lost Artifact' where he embarks on a quest to find a powerful and ancient item.