Great thread, by the way!
Here's my roll call of creepy AAs:
That ultra lanky Polar Bear in Maelstrom. He looks more like gigantic Polar Ferret.
Hairless Taft with eyeliner fanning an Egyptian in SSE. I pray to God a scene like that never played out in the Lincoln bedroom.
President Eisenhower with a pageboy haircut, a mandolin and tights in SSE. My prayers continue that this never happened in the White House Rose Garden.
Any of the ghastly horde of nightmare children who over-ran that small Mexican town in Gran Fiesta (And for that matter, all the AAs in their place of origin, IASW).
The ghost playing the piano in Haunted Mansion. Ghosts are scary enough, but when you hear hydraulics pumping when they move their limbs, it makes them even more frightening and bizarre, I'd imagine.
And though he doesn't creep me out, I want to dropkick that paperboy. The AA itself is fine, but the the high pitch 30 year olds voice that resonates out of him is an attention to detail that slipped by for a long time now and just really gets me hostile on what is one of my favorite rides of all time.