Sansa often becomes more politically savvy in fanfiction involving the Hound. She may use her experiences with him and her time in various courts to her advantage. This development could lead to her having more power and influence, and her relationship with the Hound might be affected as she becomes more of an equal to him in terms of strength and intelligence.
Fanfiction.net is another place to look. There are many Game of Thrones fanfictions there. However, the search might require a bit more effort as the site is quite large. But if you search specifically for Sansa and Loras marriage fanfiction, you should be able to find some.
I also like 'Sansa and Loras: A New Alliance'. In this fanfiction, their marriage is not just a union of two individuals but also a strategic move for their families. It goes into great detail about how they navigate the power struggles within the Seven Kingdoms while trying to develop their own relationship.
The original Sansa storylines are mainly set within the framework of the political intrigue in Westeros as it is presented in 'Game of Thrones'. However, 'dark sansa fanfiction' can take her out of that framework and into much darker, more fantastical or extreme scenarios. For instance, she might be in a world where magic has turned evil and she has to navigate through that while also dealing with her own inner demons. She may also face much more brutal and immediate threats compared to the more drawn - out political threats in the original story.
In the comics, Daredevil's marital status varies. But one notable character he marries is Elektra Natchios. However, the comic universe is complex, and there might be alternate story arcs with different spouses.