I think we're past the point where generic 'group holes up in a mall' plots cut it anymore. The genre's evolved, and the best zombie stories now use the apocalypse as a lens to examine really specific, often brutal, human conditions. A stand-out for me is 'The Girl With All the Gifts' by M.R. Carey. It flips the script entirely—the 'monster' is the protagonist, a incredibly intelligent child who also happens to crave human flesh. Her survival isn't about barricades and bullets; it's a heartbreaking navigation of her own nature versus her humanity, seen through the eyes of the scientist studying her. The ending is a gut-punch that redefines what 'survival' and even 'humanity' might mean for the next epoch.
For a completely different, almost clinical angle, 'World War Z' (the book, totally different from the movie) is a masterpiece of geopolitical and social survival. Max Brooks structures it as an oral history, interviewing survivors from all over the globe. You get the tactical failure of the Battle of Yonkers, the psychological horror of the astronaut stranded on the ISS, and the chilling efficiency of the North Korean solution. The uniqueness lies in its scale—it's about how entire civilizations, with their existing political and cultural flaws, adapt or collapse. The survival story isn't one person's, it's humanity's autopsy and prognosis, and it's terrifyingly plausible in its details.