In my opinion, nothing will beat the OG scene where the black hero in NotLD is killed by the white “rescuers.” I never got to meet Romero himself, but everything about that first movie was just brilliant.
I think the Dawn of the Dead remake was more fun than the original (the only remake with that distinction), but it somehow missed the mark on the cultural critique that the original had. The opening sequence with Johnny Cash was among the best opens ever shot, though.
Similarly, I think the opening - basically the first episode - of The Walking Dead was brilliant in an anti-Oz, anti-Willy Wonka kind of world transformation kind of intro to the series. It added a flavor of magical realism to the world/series that equaled if not surpassed 28 Days (if only because, as a series, they’d have more time to establish everything).
When we saw NotLD in our teens on VHS we loved it. And the ending left us baffled and shocked! He made it! He survived! Just to get shot when he opens the door and the hunters think he's a zombie. And then the credits start rolling.
One of the greatest WTF moments for us ever! Never forgot it!