Well Loretta's in one of my favorite Christmas classics -
The Bishop's Wife (1947), so that's enough to consider her important in my book. Her and Cary are great together and the movie has that special kind of holiday magic about it.
Her other great performance is in fact her Oscar winning one -
The Farmer's Daughter (1947). I watched this once and remember loving it and laughing a lot. Definitely need to see it again. Her Oscar was deserved. I haven't seen
Come to the Stable (1949), her other Oscar nominated, holiday themed classic but hope I can for this year's Christmas perhaps.
She had a good role in
The Stranger (1946), the only Orson Welles movie to make a profit, together with a great cast and a fascinating plot (Nazi hiding in a small town America).
Also saw her in an enjoyable western,
Rachel and the Stranger (1948), where she's torn between William Holden and Robert Mitchum.
One of her final movies,
Cause for Alarm! (1951) is also one of her most interesting. A tense, suburb noir was a change of pace for Loretta but she did a good job playing a tormented wife dealing with extraordinary circumstances. This one is in public domain and barely over an hour long, so you can find it easily on You Tube and watch it quickly.
I have
The Accused (1949), but haven't seen it yet, the quality of the print looks terrible so I don't feel like watching, but the plot sounds interesting since she plays a rape victim.
Clearly all the movies I've seen are from the late 40s, which seems to be her peak/best period but she made so many movies in the 30s and early 40s as well, I hope to watch some occasionally, especially her pre-codes which are interesting cause she had a grand lady image later in career and from what I've read some of her pre-codes were controversial.