Well, Negan's death in the TWD comics is a result of multiple factors. There's a final confrontation where his enemies unite against him, and he's just outnumbered and outmatched.
Yes, there are likely some out there. You can try searching on fanfic websites like Archive of Our Own (AO3) or Fanfiction.net. Just type in the relevant keywords and see what pops up.
Being saved from Negan is a big deal because Negan was a major threat in The Walking Dead. His brutality and power made him a feared character. So in the fanfic, it could be a turning point for 'them', a chance for new beginnings or a way to show their resilience.
An 'twd stronger than negan oc fanfic' can be interesting because it allows for a different take on the TWD narrative. The OC's strength can change the way events unfold. Maybe the OC can defeat Negan in a way that no one expected, leading to a completely different path for the story. It also gives the opportunity to explore themes like power, leadership, and survival from a new angle. Plus, the interactions between the OC and other characters, especially those who have had run - ins with Negan, can be really engaging. For instance, how will Rick or Maggie react to this new, strong force in their world?