Tar Man from the Return of the Living Dead is classic monster goodness:
Alien better be on here...either the original or the Queen Alien from
Aliens, definitely the two best
Chucky...everyone's favorite evil doll
anyone see the movie
Slither?
the baby from Brain Dead (Dead Alive)
Pennywise from IT is classic
Evil Arnie from T1 is a force to be frightened by
You guys better give love to Ghostbusters. Slimer and the Stay Puft Marshmallow Man are two obvious recommendations
And Spike from Gremlins
And 2 more from Poltergeist, the scary clown and the scary preacher
It would also be propimp if you guys included classic baddies like Frankenstein, Dracula, the Wolf Man, Freddy Krueger, Jason Voorheis, Michael Myers...
I actually think the more the merrier, but I'm a huge horror fan...it's probably my favorite genre. I'm sure others would like to chime in and their is a whole list of B-movie horror baddies as well as all the fun and campy 60s, 70s, and 80s horror films.
This guy is terrifying too, but dunno if it is horror:
