Another option could be a hybrid character. Maybe a half - Dark Angel, half - Star Wars species character. This character would be constantly torn between the two sides of their heritage, having to decide whether to embrace their Dark Angel side, which might be more about physical strength and survival, or their Star Wars side, which could involve the moral choices related to the Force.
Another possibility is a new character, a smuggler or a bounty hunter, who gets caught up in the events of the dark resurgence. They might not have any initial interest in the struggle between the light and dark side, but circumstances force them to take a side. This would bring a different perspective to the story compared to the usual Jedi - Sith focused plots.
The main character could be a padawan who was orphaned during a Sith attack. This padawan has always had a strong connection to the light side but has been struggling to fully embrace it due to the trauma. Through the story, they learn to 'let the light in' and become a powerful Jedi.
Darth Vader could be the main character in a second - chance fanfic. He could be brought back to life and given the chance to fully embrace the light side from the start. He could use his knowledge of the dark side to help the Jedi fight against a new and powerful evil in the galaxy.
It might be an entirely new character made up for the fanfic. This character could be a powerful Sith Lord who has a family or is in a father - like role to other Sith. He would be a source of dark power and influence within the story.
A possible plot could involve a Dark Angel being a long - lost relative of a powerful Star Wars character. For example, if they were related to a Jedi, they might struggle with their own dark tendencies while also trying to fit into the Jedi way. Or if related to a Sith, they could be the key to a new power or prophecy within the Sith hierarchy.
Sasuke could also be a main character in such a fanfiction. Given his brooding nature and his search for power, the addition of dark angel powers could take his character in an even more complex direction. He might be more tempted by the dark side that comes with the dark angel powers.
It could be a reversed Darth Vader. Instead of being a Sith Lord on the dark side, he could be a powerful Jedi who uses his skills to fight against the new 'evil' which was once good. He might have a red lightsaber still, but it represents the new 'light side' in this reversed universe.
It could be Harry Potter himself. Imagine Harry being sent to the Star Wars universe. His heroic nature and powerful magic would attract various characters. Maybe Rey from Star Wars would be interested in his magic and his ability to stand up against dark forces. And some female Hogwarts students might also be part of his 'harem' as they continue to support him in his new adventures.
A Mandalorian could be the main character. Mandalorians have a rich culture and history in Star Wars. A story about a Mandalorian who has to break from their traditional ways to save the galaxy from a new threat, like a powerful Sith Lord or a dangerous alien race, would be exciting. They could use their unique combat skills and armor to fight against the odds.
The main characters could be a group of nerdy college students who are huge Star Wars fans. They might be studying astrophysics or some other related subject. One could be a whiz at building droids in their dorm room, another could be an expert on Star Wars lore and constantly quoting it.