Rather than resurrect a zombie, I’m starting a new Creepy Commercials thread.
I’ll start it off with this one for Austex Beef Stew from 1966.
Arnold Schwarzenegger in advertisements for nicotine-based energy drinks is always a good one:
Whatever pays the bills.
Any commercial on American tv that advertises prescription drugs, and then goes off about the list of side effects. That always comes after the disclaimer, if you’re allergic to drug XYZ, don’t take it.
My favorite side effect is “death has occurred.”
I don’t see anything particularly creepy about the stew commercial. Except the bit about canned spaghetti and meat balls at the end.
Before Google existed, we had to ask Satan how candy bars are made.
The husband seems like he’s ready to flip out at any moment. The wife seems to be in fear of her life if her husband finds out the stew is from a can. The daughter looks like she’s just waiting for a bloodbath.
Oh hell yeah, great choice. To be fair, it’s pretty appropriate / clever for the time. It’s looking back from here where we can really see the maximum creep factor.
I misinterpreted the OP and dug up this, the creepiest commercial of my childhood Suspiria.
Sorry if this was hijacky.
The original " My Hose" commercial. They have since toned it down. It sounded like he was describing something other than a hose.
Remember when breakfast was creepy?
How about Paul Lynde being snide, and a coffee pot that ejaculates three feet across the kitchen table?
Somewhere, on vinyl, in the storage unit, I have the soundtrack by Goblin.
Eagleman Car Insurance (might have only been in Chicago…not sure).
What in the actual fuck?!
I’m pretty sure everyone involved is in on the double entendre, and everyone of them giggle like 12 year olds through it all.
OK, the stew, eh. I didn’t see it. The clown? Not that bad, I love Paul Lynn. The ice cream takes the creepy tittle hands down. I was physically cringing, and almost couldn’t watch the whole thing. I agree with @Odesio. WTAF indeed. 
Still my favorite commercial of all time.
I wouldn’t have thought it possible, but that may not be the creepiest commercial for Little Baby’s Ice Cream.
