Awesome. Authors, check it out. Very helpful list.
I created this list to address that challenge. The expressions are broken down by the part of the face. Note that some of them work for more than one emotion—a person might narrow their eyes out of vindictiveness or skepticism, for instance, and their face might turn red out of anger or out of embarrassment.
Some of them require a little more explanation on your part. You’ll have to say what she’s glaring at, or if his face is contorting in rage, or grief, or what. And not all of these will work for every character—it depends on what they look like and how they generally react to things.
Some of these aren’t exactly facial expressions, but useful for dialogue tags. In many cases I’ve given several ways to describe the same thing. While I have included some longer phrases, they are not proprietary and it’s fine to use them.
The PBS Blog 