Well. For some reason, looking up the creepy 1985 film, Return to Oz, was on my to-do list at IMDB tonight and I saw her. At last! In my mind's eye (making her a little younger than this pic, of course), I was seeing Jean Marsh:
That knowing look she has was what struck me as so Melisande-like! Oddly enough, googling for pictures of her in younger years doesn't give me the same "Oooh, Melisande!" effect. Maybe it's just that look on her face. LOL
I had to share this just because it always eluded me who I was seeing in my mind's eye!