Seán Fleming (Laois, Fianna Fail) | Oireachtas source

I am not fixed to this, but I will suggest the City of Dublin ETB, given its sheer size. It would be an obvious one, seeing as how it is the largest by a mile. I have no particular issue with it, but it would be strange not to invite it to attend. It is the most prominent ETB, so inviting it to attend would almost be automatic.