I don't consider chana masala, fagioli all'uccelletto, shepherd's pie, tourtière du Lac-Saint-Jean or crepes to be merely groupings of ingredients which we give a name. They all have a varying set of ingredients with a set of steps, and it gives a final result that's better (or at least different) than putting each of those ingredients next to each other.
That's my main issue with considering "fish and chips" as a dish. Unless I'm missing something, it sounds like you're just putting battered fish next to chips, and they're not interacting or integrated in any way.