My favorite le Guin is Always Coming Home, a very hopefully look at a post-climate catastrophe Earth which features one of the most realistic takes on what self aware AI would do. It's also a very interestingly written book, more of a collection of related works than one coherent novel.

Omelas is a very white liberal boomer story. My parents are both hippies who walked away from bougie families to live out in the woods, trying not to be part of a bad system. Of course in real life you can't really escape the system, but they tried and thanks to their privilege they could have land and freedom to raise some hippie kids and make a lot of art. Not a bad life at all, but also did they really change anything?

The Ones Who Stay and Fight seems to me to come from a much more grounded perspective. Walking away is just a safety valve for Omelas.