1. Moore Business Forms

2. Ivory

3. Heinz (read the copy)

4. Cutex

5. Rid Jid

6. ICE

7. GE

8. Serax (a big anxiety drug in the 1960s)

9. Fairbanks-Morse lawnmowers

10. Tab

11. There's an endless archive of these horrible ads:
Here's 10 more, including ads by Goodyear, English Leather, and Palmolive.
And here's 10 previous ones, including ads via Midol, Listerine, and VW.