Unfortunately, there are still staff posts appearing in search. I looked at the css, and managed to narrow down the section using this:
.fps-result .author a[data-user-card=“system”] {
}
but it seems that there is no current way to select the parent class in the css spec (though its in a future spec), so I don’t see how it’s possible to hide these search entries without changes to the way discourse styles entries on the search pages.