What about Linda Sohus?
http://www.charleyproject.org/cases/s/sohus_linda.html
She was a statuesque woman, 6ft tall and not skinny (I note that no height is given for the Doe?) and she was last seen slightly less than a week before Valentines Day 1985.
This link
http://www.pasadenastarnews.com/mystery/ci_10110450
has a story with a grainy black and white newspaper photo of her wearing some sort of ring on her right index finger.