All of the available tools get us into the really silly fantasy that the rules of our grammar are a hierarchy. The industry nomenclature requires that the highest level of the hierarchy be called the start rule. It is commonly quipped that in right-hand reducers the top is really the stop rule. But those who join this interaction are sufficiently astute to understand that it is all the same. But you see, the entire concept is inapplicable.
Hierarchies are great.
But that is not what is out there. There have been a few posts that pointed to and commented on the syntax rules available at the University of Amsterdam. That is a great example. It has one summary comment about 1100 rules, if I remember correctly. But note that it is entirely an optimistic grammar.