I'm pretty generous with my max-ratings, so that list can go on all day. There are plenty of movies I've rated 10s because they're basically perfect in what they set out to do. A movie like Killer Klowns from Outer Space a 10/10 for being the best(only?) space-clown movie ever. Creepshow is a 10/10 for being the coolest fucking anthology ever. Deathbed: The Bed that Eats is the best nightmarish murderer-bed movie ever, etc... There are a lot of movies that are perfect and/or 10/10s.

To dumb down this list to a reasonable size, I'll just give a Top-10 10/10s list.

Dawn of the Dead (1978)
The Evil Dead (1981)
Gummo (1997)
Halloween (1978)
Martin (1977)
Pink Flamingos (1972)
The Rocky Horror Picture Show (1975)
Spring Breakers (2012)
The Terminator (1984)
The Texas Chainsaw Massacre (1974)