I think skeletons are scary. Always have. I remember one episode of Scooby Doo scaring the hell out of me when I was a kid once because the bad guy was a skeleton. Sea monsters and ghost miners didn’t faze me, but that skeleton sure spooked me. “Nightmare on Elm Street 3, The Dream Warrior” had a skeletal Freddy that I thought was one of the best effects ever for a walking/fighting skeleton. (I’m sure that if I saw it today it would pale in comparison to my memories.) Then “Army of Darkness” had an army of the things, but they still looked like puppets.