I had the privilege of associating with some crazy foodies. They list the food groups:
(A) alcohol (red wine, beer)
(B) beverages- water, tea, coffee, etc
(C)chocolate dark,
(D)dairy,
(F)fish, fruit, fungi
(G)grains
(L)legumes like chic peas or green beans
(M)meat red
(N)nuts
(S)seeds, seaweed, seafood
(T)tubers such as potatoes and yams
And this is pretty much it. There are 14-15 food groupings. I may have missed one.