Perhaps in a very different role than we've seen them in before, Ship's Counsellor perhaps?
To have a councilor who feels nothing emotionally themselves, ask you how you feel? That would be interesting.
That's what I thought. They don't express their emotions but do have them, they choose to control them and follow a path of logic. There was that VOY episode where Tuvok helped analyse Kim's infatuation on a 'hologram'.
If they did go this route, I'd like it to be a male Vulcan so that there was a man as ship's counsellor (Troi jumpsuit optional