Was it the dispatcher (https://taxishow.fandom.com/wiki/Louie_De_Palma) for the Sunshine Cab Company or the owner (https://itsalwayssunny.fandom.com/wiki/Frank_Reynolds) of Paddy's Pub?

I will cast my vote for Louie DePalma. It was the role that put Danny DeVito on the map and his portrayal of Louie was outstanding.