Well, 'Dark Anakin: The Untold Story' is also a good one. It focuses on Anakin's actions after fully turning to the dark side. It presents a different perspective on his character, showing him as a more complex figure rather than just a one - dimensional villain. The story has some great action scenes and character development.
Fanfiction usually develops Anakin's character by showing his relationships in a new light. His bond with Palpatine could be shown as more complex, with Palpatine slowly manipulating Anakin over a long period, preying on his weaknesses like his desire for power to save Padmé. This makes his turn seem more gradual and believable.
You can start by looking on fanfiction websites like Archive of Our Own or FanFiction.net. Just type in 'Anakin Skywalker dark side' in the search bar and a whole bunch of stories will come up.
Some fanfictions explore Anakin's turn from the perspective of his friendship with Obi - Wan. Maybe there's a rift between them caused by outside forces, like a false accusation against Anakin that Obi - Wan doesn't fully believe him about. This slowly sours their relationship and Anakin, feeling abandoned by his friend, is more susceptible to the dark side's allure.
If Luke Skywalker turns to the Dark Side in fan fiction, one possibility is that he could become a powerful and feared Sith Lord. He might use his Jedi skills in a perverted way, like using the Force to dominate rather than protect. His relationship with his friends would be severely strained. Leia, for example, would be heartbroken and might try to bring him back, but it would be a very difficult task. Han Solo would also be in a tough spot, having to choose between his loyalty to Luke and his own sense of right and wrong.
Maybe in the fanfiction, Luke witnesses something so devastating that he loses faith in the Jedi way. For example, if the Jedi Order fails to prevent a great catastrophe. This could push him towards the Dark Side as he seeks a more radical solution to bring order. He might start using aggressive and unethical means, like Vader did, believing it's for the greater good.
If Luke turns to the Dark Side in fan fiction, the story would take a very different turn. The relationship dynamics would be completely altered. His friends like Chewbacca, who had fought beside him, would be in shock. His fall could also inspire other Jedi - in - training to question their own paths. Maybe some would be tempted to follow him into the Dark Side. And the Emperor, if still alive, would have a new tool to use against the remaining Jedi and the Rebellion. He could use Luke to spread fear and chaos, which would be a very different plot from the original Star Wars stories.
A possible plot twist could be that Obi - Wan was actually faking being turned to the dark side all along. He was trying to infiltrate the Sith ranks to learn their secrets and stop them from within. He lets Anakin think he has succeeded in turning him, but in reality, he is still a Jedi at heart and has a plan to take down the Sith.
A common theme is the fall to the dark side. It explores how Anakin gradually becomes Dark Anakin, his internal struggles, and the events that lead to his transformation. Another theme is redemption. Some fanfics try to show a way for Dark Anakin to come back from the dark side.
His friends like Han Solo and Leia would be deeply affected. They would either try to save him or be forced to fight against him. This would create a great internal conflict within the group that once fought together against the Empire. Also, Luke's turn could inspire other young Force - sensitive individuals to follow the Dark Side, thinking that he has found a better path.