My list will be Olivia's movies I particularly take to (not every one of these being a greatest performance, but each of these being a film I enjoy and find easily watchable) arranged in chronological release order:

• The Charge of the Light Brigade (1936)
• The Adventures of Robin Hood (1938)
• Gone with the Wind (1939)
• The Snake Pit (1948)
• Hush...Hush, Sweet Charlotte (1964)

It's a "soft" list, as I'm going by memory, and I'd no doubt want to make some switches if I were to newly re-watch some of her other good films that I haven't seen in years.

This is a bit difficult, mainly because I wasn't a big fan of her but loved a lot of the movies she was in. I'll have to think about it for a couple of days.

When I was growing up (kid and teen), I loved Olivia in movies - but eventually became weary of how impossibly "sweetness and light" the good, noble-spirited, kindly, wholesome, soft-spoken characters she portrayed tended to be, so to large extent rejected her (therefore also her movies) for a long time.

I've in recent years eventually "come back around" about Olivia (enough to be able to appreciate her and to enjoy her movies again - though I never actually outright specifically seek her out), as her sort of portrayed characters can be "a bit much" to take in more than limited doses.