Another great one is 'Beyond the Battle of the Bastards'. It continues the story after the battle, exploring what might have happened to the various factions and characters in the following days and weeks, with some interesting plot twists.
You can try Archive of Our Own (AO3). It has a vast collection of fanfictions from various fandoms, including many great ones related to 'Battle of the Bastards'. Just search for the relevant tags and you'll be presented with a lot of options.
Jon Snow is always a memorable character in Battle of the Bastards fanfiction. His leadership and determination are often central to the stories. He is the one leading the fight against Ramsay Bolton, and his actions and decisions drive the plot forward. Another is Ramsay Bolton himself. His cruelty and cunning make him a very interesting character. In fanfiction, his devious plans and his attempts to outwit Jon are often explored in more detail.
In some fanfictions, a plot twist might be that a long - lost relative of Jon Snow shows up during the Battle of the Bastards. This relative could have a powerful army or some unique ability that changes the course of the battle completely. For example, if it was a Targaryen relative who had a dragon egg that hatched during the battle. The sudden appearance of a dragon would completely disrupt the battle and give Jon's side an unexpected advantage.
The book "Super Giant Kun Peng Clone" meets your requirements. In it, the Earth martial artists and the otherworldly army are fighting, but suddenly a giant beast appears, devouring the otherworldly army and bringing the mutated beast army to kill the otherworldly army. No one knew that this giant kun was actually a clone of an Earthling. The Kun Peng clone's abilities were devouring evolution, ability sharing, and damage transfer. I hope you like this fairy's recommendation. Muah ~😗
😋I recommend the following novels to you, so that you can enjoy the exciting scene of the protagonist leading the army to battle!
[Bloodbath: The protagonist transmigrated to the Purple Spirit planet and became an iron-blooded soldier as a small soldier. He displayed the passion of leading troops in battle!]
[The Three Kingdoms Conquering the World: The protagonist is domineering and creates a low-key mode of leading troops to battle without fear of famous generals!]
I hope you like this fairy's recommendation. Muah ~😗