One popular OC is a female warrior from a nomadic tribe. She has skills in archery and horseback riding that are on par with the Dothraki. Her story often involves her joining forces with Daenerys, and together they bring about changes in the way the Dothraki are perceived and led. Her unique fighting style and strong - willed personality make her a favorite among fans.
There is often an OC named Lyra Targaryen. She is usually depicted as a strong - willed character with a gift for strategy. Many fanfictions focus on her attempts to navigate the complex politics of Westeros.
Often, the strong and morally ambiguous OCs tend to be popular. They can be characters who are not afraid to break the rules and make bold moves in the world of Westeros. Maybe an OC who is a skilled fighter and strategist, and uses their harem to gain more power and influence.
I think it could be the blacksmith OC who has a strong moral code. For instance, an OC who refuses to make weapons for evil lords or sells his work only to those who he believes will use it for good. This type of character adds depth to the fanfiction and can be very appealing to readers who like complex and morally upright characters.
Jon Snow - like ocs are quite popular. They are often strong, brooding characters with a sense of honor and a complex backstory. They might be outcasts in society, just like Jon was as a bastard, but have great potential.
Jon Snow - like SI OC characters are quite popular. These characters often have the same noble and brooding qualities as Jon, but with the added advantage of being self - inserts. They might use their knowledge of the original story to make different choices in battles and political situations.
Well, Daenerys Targaryen is often a popular choice. Her dragons and her journey of reclaiming the Iron Throne can be easily adapted into crossovers. For example, if she were to cross into a world full of magic - users, how would she use her power? Also, Jaime Lannister is quite popular. His character arc from a seemingly villainous knight to a more complex figure can be explored in different settings. In a crossover with a historical setting, his knightly skills and code of honor (or lack thereof at times) would be very interesting to play with.
Cersei Lannister could also be a popular choice. Her cunning and thirst for power in Game of Thrones could be enhanced in the Overlord fanfiction world. She could use her wits and the resources of the Lannisters to become a powerful Overlord - like figure, perhaps even making deals with the dark forces often associated with the Overlord concept.
One of the most memorable OCs could be a female warrior. She defies the gender norms of the 'Game of Thrones' world and is able to hold her own in battles. Her strength and determination make her stand out.
An OC Stark might be more politically astute than the original characters. They could form different alliances, like making a deal with the Iron Bank that gives the North more financial power and influence. This would shift the power dynamics not only in the North but also across Westeros. The original plot of various houses vying for the Iron Throne would be affected as the North becomes a stronger and more independent force.
Definitely the Dragonborn and Daenerys. As mentioned before, they both have a dragon - related aspect. Their personalities are also quite strong. The Dragonborn is a hero with great power and Daenerys is a powerful queen. Their meeting would be a clash of two strong - willed leaders.