Just following up on that question and the video, Volumes is one way of dealing with it but you probably want to be more precise and still use tagged Actors. So here’s what you’re looking for:
Get Actor Data → Actor Filter = All World Actors → Actor Selection = By Tag → Actor Selection Tag = your Actor Tag → then the Difference node
Also, tick the “Must Overlap Self” and “Select Multiple”.
However, what I would like to know is whether there is a good way of using a list of tags, without the need for custom PCG Blueprint Element or some other type of workaround.