I am STUNNED that this is such a close race. I would've thought slam-dunk guarantee that Ghostbusters would've made it.
I am a big YES, I think it's one of the great comedies and an incredibly strong, well-structured script (so much so that they basically reused it for Ghostbusters 2). Great effects, full of fun ideas, and some astoundingly good comedic performances.
Bill Murray doing his best Bill Murray; Harold Ramis' stiff, odd Egon (who is pretty darn distinct from Dan Aykroyd's ball of enthusiasm Ray); Sigourney Weaver as the smart woman who sees through Venkman's shit, then flipping into the unhinged, possessed Gatekeeper; and perhaps best of all is Rick Moranis as Louis Tully. I've seen this movie a ton of times, and I've come to appreciate how incredible he is here.
Every scene is full of fantastic punchlines and delightful little asides. It's had as much cultural impact as any movie from the '80s -- the catchphrases, the terminology, the spin-offs, Slimer, The Stay-Puft Marshmallow Man, the no-ghosts logo.
I know that I'm at risk for rose-tinting here, but I can recognize those cases in myself (and I do have some, oh boy howdy do I), but any idea that we need to account for nostalgic distortions was washed away by Amy arguing for The Neverending Story, or including Karate Kid or some of the other entries in her left of better-in-1984 list. They may be okay, but they are not great by any standard that doesn't include heaping doses of nostalgia.
Glad to have the Canon back, let's welcome it back right. Gotta get Ghostbusters in.