Hi Jon. Perhaps this recent discussion is relevant:
https://www.wikitree.com/g2g/1727001/is-there-a-category-for-romani-people
Jon, just to check: are you aware of the difference on WikiTree between a tag and a category?
Tags apply to G2G questions. See
https://www.wikitree.com/wiki/Help:Tags
Categories apply to profiles. See
https://www.wikitree.com/wiki/Help:Categorization
i don't think there are existing projects for either artists or the GRT community. Projects are listed at
https://www.wikitree.com/wiki/Help:Projects