A really good Sasuke x Naruto fanfic is 'The Redemption of Sasuke'. In this fanfic, Sasuke's journey towards redemption is intertwined with his relationship with Naruto. It shows how Naruto's unwavering belief in Sasuke helps him come back to the right path. 'Naruto and Sasuke: A New Beginning' is also a great one. It starts with a new scenario where they have to rely on each other more than ever. It's full of action and at the same time, the development of their relationship is well - written. And then there's 'Sasuke x Naruto: The Ninja's Heart' which focuses on how their hearts are connected in ways that are unique to them as ninjas.
Naruto is likely to be popular too. Even though it's a Boruto x Sasuke fanfic, Naruto's relationship with both of them is so important. He could play a role in supporting them from the sidelines or even getting involved in a crucial part of the story.
As of now, Naruto and Sasuke haven't died in the Boruto manga. Their characters continue to play significant roles and contribute to the story's development.
You can start by looking on fanfic websites like Archive of Our Own (AO3) or Fanfiction.net. Just type 'Sasuke x Naruto' in the search bar and a whole list of fanfics will pop up. You can also check out Naruto - related forums where fans might recommend some great ones.
I really like 'Naruto and Sasuke: The Unseen Path'. This fanfic explores an alternate universe where Naruto and Sasuke have to face a new threat together right from the start. It's full of action and also has some really touching moments of friendship development between the two.
One possible story could be Sasuke in an alternate universe where the events of 'Road to Ninja' take a different turn for him. Maybe he teams up with Naruto earlier and they face the challenges together, with Sasuke having to confront his inner demons in a whole new way.
One interesting plot could be Sasuke taking Boruto on a special training journey across different hidden villages. This would not only strengthen Boruto's skills but also give them a chance to bond like master and apprentice.