I can definitely see why so many places calling themselves or specific items on the menu "famous" would irk you. If everyplace is famous, then no place is actually famous. I am so used to seeing it, I don't even pay attention to it anymore.
So, out of all the restaurants reviewed on Roadfood, which one do you think is the most famous, in that the highest percentage of the general public would recognize the name and have some kind of knowledge about the place? My first thought would be Cafe du Monde in New Orleans. Maybe the Varsity in Atlanta or Carnegie Deli in New York?