I only know of bad ones. My Bloody Valentine (the original) is kind of a good kind of stupid, and Sleepaway Camp is just straight up crazy.
For monster ones, theres Frogs, where the evil killers are just normal frogs...except the frogs never actually kill anyone, they just kinda outsource to spiders and lizards and things. At any rate it stars Sam Elliot without a mustache, so theres that.