Another good one is 'Unleashing the Spark'. This fanfiction takes a different approach by having Stiles' spark being a key factor in solving a mystery that has been plaguing the town. The story is filled with suspense and interesting twists, and it also has some great banter between Stiles and the other characters.
One interesting Stiles fanfiction is 'Stiles' Time - Travel Trouble'. Here, Stiles gets thrown into different time periods and has to find his way back. It's a fun read as it shows Stiles in various historical settings and how he uses his modern - day knowledge to survive. There's also 'Stiles and the Forbidden Friendship' which explores an unlikely friendship Stiles forms with a character from the other side of the supernatural divide.
One popular 343 Guilty Spark fanfiction is 'The Adventures of Guilty Spark'. It delves into the backstory of Guilty Spark and its interactions with the Halo universe in a really interesting way.
Sorry, I don't have specific single spark fanfiction to recommend off - hand. But you can try searching on popular fanfiction websites like Archive of Our Own. Just type in'single spark' along with the name of the fandom you're interested in, and you might find some great reads.
The theme of power and responsibility is prevalent as well. Stiles has to decide how to use his 'spark' for good. Some fanfictions show him using it to protect his town, while others might explore the temptation of using it for personal gain and how he resists or succumbs to that temptation.
One good Stiles - Avenger crossover is 'Stiles in the Marvel Universe'. It has an interesting plot where Stiles uses his wits from the Teen Wolf world to interact with the Avengers. Another is 'Stiles and the Avengers: An Unexpected Alliance' which shows how Stiles' unique skills could be useful to the Avengers.
One popular Stiles werewolf fanfiction is 'The Alpha's Mate'. It has an interesting plot where Stiles discovers his unique connection to the werewolf pack. Another great one is 'Stiles: The Hidden Werewolf'. It focuses on Stiles hiding his werewolf nature from his friends at first.
Well, 'Stiles and Peter's Unlikely Friendship' is a fanfiction that really stands out. It begins with their initial animosity and gradually develops into a deep bond. It has some really interesting character interactions and plot twists. Then there's 'In Peter's Shadow, Stiles Grows' which focuses on how Stiles matures under Peter's influence. And 'Stiles and Peter: Facing the Darkness' is a story where they face a common enemy together and their relationship evolves throughout the fight.
There's 'Stiles' New Beginning' which is also a wonderful piece of fanfiction. It takes a different approach to the relationship between Stiles and Flinches. It shows how they grow together in a unique situation, with lots of interesting plot twists and turns. It really makes you invested in their story.
I'm not sure about specific 'Stiles is Stuart' fanfiction off the top of my head. However, you could also try fanfiction forums. There, fellow fans might be able to point you in the right direction. They could recommend their favorite stories that involve this interesting concept of Stiles being Stuart. Maybe it's a crossover idea where Stiles from one universe becomes Stuart in another related or unrelated fictional world.
One popular Stiles Hurt fanfiction is 'Bleeding Out'. It really delves into Stiles' emotional and physical pain in a very engaging way. The author does a great job of building up the tension and making the reader feel for Stiles throughout his struggles.