*Oh no wait!! I am wrong. It was the Hamburgler. Grimace was the purple one, right? The one wearing a chain gang/escapes con outfit and mask was evil.
I was terrified of him. I used to have nightmares that he was Jack the Ripper. I think that idea partly spawned from an old Sherlock Holmes episode on PBS.
* I was also scared of clowns so you can add Ronald to the list.
Aside from that I was (as I have mentioned before) scared of my Rainbow Brite doll. I wanted her so bad but, she ended up creeping me out. I hid her in the back of my closet.
The idea of Santa Clause coming into the house scared me. We didn't have a chimney so he probably had to break in and that made me nervous.
That is all I can think of right now.
One of my friends was terrified of opened black umbrellas. Her mom would open one and lay it in the floor when she mopped to keep her out of the room.