I had another one come to mind--solifugae. Imagine a large spider with an extra set of limbs that they can wave around menacingly, a super creepy vertical mandible, and some crazy aggression. Seriously, they would serve as a great base for some terrifying human-munching monster if you wanted to size one up big enough in a comic.
Seriously, the things were in my last workplace, and I am now super cool with spiders because they are not solifugae. Spiders just want to chill out in a corner and eat bugs. Solifugae will chase you down and try to bite you, as I ended up chasing and being chased by one in my workplace when I stumbled on one that was too big to let live.
(I worked in a dark room...and I didn't want to go about thinking that an especially big one was roaming the place and potentially crawling up my leg)