I have to admit enjoying a little potatoes with my dairy, but I still hold that any potato dish that requires more than a little butter and seasoning to taste good is inherently no longer a potato dish.
You can add all the stuff you want after that and it still counts, but it the dish doesn't taste good without a pound of butter, sour cream, cheese, etc, then there's little point to having potato in it at all. Might as well just use corn starch or flour.
Baked potatoes are a pretty pure form of potato as dishes go.