No. Writing fanfiction that involves sexual content is often inappropriate as it can violate the boundaries of the original character's integrity and can also be disrespectful to the source material and its fans. Moreover, it may not be suitable for all audiences, especially younger ones.
Some popular Black Panther Erik Killmonger fanfictions often explore his complex character. You can start by looking on fanfiction platforms like Archive of Our Own. There are stories that delve into his backstory, his relationship with T'Challa, and his own internal struggles. For example, some fanfictions might show how he could have been redeemed or what might have happened if he had survived.
In Black Panther fanfiction, Erik Killmonger is often portrayed as a complex and conflicted character. His actions in the movie were driven by his desire for justice, albeit in a very extreme way. Fanfiction writers may expand on this, showing his internal battles between his love for Wakanda and his hatred for the system that he felt had wronged him. For instance, some stories might show his struggle with the idea of being a true Wakandan while also wanting to change the status quo.
You could write fanfiction that focuses on his backstory. For example, explore his upbringing in Wakanda or his experiences outside of it that led him to his radical views. This would add more depth to the character.
There are some. However, the quality can vary greatly. Some might focus on exploring his character in a relationship in the context of the Black Panther universe, while others might take more creative liberties. It really depends on what you're looking for in a fanfic. If you like more angsty stories, you might find some that deal with his internal struggles in a relationship. If you prefer something more light - hearted, there could be those as well.
One common theme is redemption. Since Erik Killmonger is a complex and somewhat villainous character, many fics explore the idea of him finding redemption through his relationship with the reader. For example, the reader might be the one to show him a different path or a new way of thinking about power and justice.
One great Erik Killmonger x OC fanfiction could be where the OC is a scientist in Wakanda who initially opposes Killmonger's radical ideas but gradually comes to understand his motives. Another might involve an OC from outside Wakanda who meets Killmonger during his travels and gets drawn into his quest for power. There are also those where the OC has special powers and they form an alliance with Killmonger in the fight against the traditional Wakandan regime.
In some fem Harry x Erik Killmonger fanfiction, the plot could revolve around a prophecy that involves both of them. Fem Harry, with her knowledge of magic and prophecy from her own world, and Erik Killmonger, with his determination to change Wakanda. They might have to work together to fulfill the prophecy, which could lead to a complex relationship. Along the way, they could face opposition from both their own worlds and have to overcome cultural and ideological differences. This could also lead to a romantic relationship developing between them as they learn more about each other.