An engineer or scientist who was involved in the creation of the clones could be the main character. They could have a change of heart and try to find a way to give the clones more freedom and individuality. This character would have to deal with the ethical implications of their actions as well as the political and military forces that want to keep the clones as they are.
Perhaps a plot where a clone survives a major battle and is found by a group of smugglers. The clone then has to adapt to a new life outside of the military structure. He could bring with him unique skills and knowledge that the smugglers can use, but also has to deal with his own identity crisis. This story could show how the clone culture and the underworld of the Star Wars galaxy interact.
It could be a former Imperial officer who has seen the error of his ways. After the fall of the Empire, he tries to live a normal life but is drawn back into the conflict when he discovers signs of the Empire's return. He uses his knowledge of Imperial tactics to help the resistance against the returning threat.
Obviously, Luke Skywalker could still be a main character. He has a lot of potential for further development as he continues to grow as a Jedi Master. Leia could also be central, as she takes on more leadership roles in the new galactic order. And of course, there's always the possibility of new characters being introduced, like a young Force - sensitive alien who becomes an apprentice to Luke.
In the 'Star Wars Clones Graphic Novel', the main characters are predominantly the clone troopers. These are genetically - engineered soldiers with their own distinct identities within the group. Alongside them, you'll find the Jedi generals who command them. Jedi like Yoda could also make appearances in the story, guiding the overall strategy. And don't forget about the various villains they face, such as Separatist leaders or their droid armies. These characters all play important roles in driving the plot forward.
A Rebel pilot could be the main character. After getting injured in a battle and having some dental problems as a result, they decide to study dentistry while recovering. They then use their new skills to help their fellow Rebels. They might even find a way to use dental tools as weapons in a pinch, like using a dental drill to break through enemy ship controls if they are captured.
A young scavenger from a planet in the Outer Rim could be the main character. They find the Darksaber by chance and then are thrust into the larger Star Wars universe, having to learn about the weapon and deal with those who would kill to have it.
The main characters are Anakin Skywalker, Padmé Amidala, and Obi - Wan Kenobi.
An alien species member who has a completely different view of the Force compared to both the Jedi and the Sith. This character could come to the galaxy's main powers and try to change the orders. Their unique biology and culture give them a different perspective on the Force, and they believe that by changing the orders, a new era of peace and understanding can be achieved in the galaxy.
It could be a previously unknown son of Luke Skywalker. Maybe he was hidden away for some reason and now he's lost in the galaxy, trying to find his father or his place among the Jedi.
It could be a young Imperial officer who starts to question the Empire's extreme measures for revenge. This character might see the wrong in what the Empire is doing and eventually defect to the Rebellion.