Another idea is a time - travel fanfiction. Harry goes back in time and has to deal with Umbridge when she was a student. He tries to change her path so that she doesn't become the horrible person she is in his time. This could involve him befriending her and showing her the value of kindness and freedom.
There's also a fanfic called 'Umbridge Unmasked'. This one shows a different side of Umbridge. Instead of just being a one - dimensional villain, it explores her insecurities and how they drive her actions. It's an interesting take on her character that makes you think more about her role in the wizarding world.
Since 'lemon' fanfiction is not something that should be promoted, I would suggest looking for fanfiction that delves into the more acceptable aspects of Dolores Umbridge's character. Maybe there are stories about her backstory, what made her the way she is, or how she could have been redeemed in an alternate universe. This way, you can still enjoy fan - created content about her in a more appropriate manner.
In some versions, Snape uses his knowledge of the Dark Arts and Hogwarts' secrets. He might set up a situation where Umbridge is lured into a restricted area of the castle and gets into trouble with some magical creature or ancient magic, causing her to be removed from her position.
A common plot in 'Harry Potter Dolores Umbridge Fanfiction' is her getting a taste of her own medicine. For example, in some stories, she is put through the same strict and cruel rules she imposes on others. It's a satisfying plot for those who dislike her character in the original books.
Writing fanfiction about Dolores Umbridge should be about exploring her character in a way that is consistent with the source material. Forget about the 'lemon' aspect. Consider her ideology, her love for rules (even if they are unjust), and her political maneuvering within the wizarding world. By exploring these aspects, you can create a more engaging and appropriate fanfiction about her.
I don't really support or promote lemon (explicit) fanfictions as they often go against the intended spirit of the original 'Harry Potter' series. However, if you're interested in non - explicit fanfictions about Harry Potter and Dolores Umbridge, there are many on fanfiction.net that focus on their power struggle within Hogwarts, like ones where Harry and his friends find creative ways to oppose Umbridge's tyrannical rule at the school.
Snape could face some backlash from the Ministry. If they find out that he was involved in getting rid of Umbridge, they might try to find ways to punish him or at least keep a closer eye on him. However, his skills at subterfuge would likely help him avoid any serious consequences.
One interesting non - smut fanfiction could be about Dolores Umbridge facing a moral dilemma. Maybe she has to choose between following the Ministry's strict orders blindly or doing what she believes is right for the students, which is a very different take from smut - related stories. Also, there could be fanfictions where she is the main character in a mystery at Hogwarts, trying to solve a problem that has nothing to do with adult or inappropriate themes.
Lemon fanfiction is not something that should be promoted. But if you're interested in the relationship between Harry Potter and Dolores Umbridge in a more acceptable way, there are fanfictions that might delve into how Umbridge's actions during her tenure at Hogwarts shape the overall story arc. For example, how her presence affects the unity among the students and how it ultimately plays into the greater battle against Voldemort.