Two examples I'm particularly fond of:
- GitLab Issue Filters. The user is seamlessly guided by suggestions (https://gitlab.com/gitlab-org/gitlab/-/issues)
- AdminColumns Wordpress List table Filters. As with GitLab, the user is seamlessly guided by suggestions. Next to that, I'm a big fan of how the filter get translated into a human-readable description after being created. (https://www.admincolumns.com/smart-filtering/)