"wrangler" role or group

I created one “wrangler” group for each queue we have. Whenever a
new ticket is created in a queue, that queue’s wrangler group gets
notified. Neat!

BUT… I need some of our unprivileged clients to be wranglers
too. I tried to add them to wrangler groups, but it seems
unprivileged users cannot belong to groups.

What should I do? I know that unprivileged users can belong to Roles
such as CC, so perhaps I need to make a wrangler role for each
queue? Or are roles “off-limits” for modifications, or am I just
totally barking up the wrong tree?