While reading through each DB type page for fun, I found an interesting quirk — some types, such as Flying, note in their descriptions that Pokemon of that type, on average, have a higher stat than other types.
However, this information is not noted for every type, with it only mentioning that Flying is the fastest, and Rock & Ice have good defenses. Any other mentions of offense or defense are in the context of type (dis)advantages. It is also unclear how up-to-date this information is.
I would like to know the top three types with the highest average stats, including BST. I am asking for the top three as I fear that Dragon being the typing of most Pseudo Legendaries + a good amount of Legendaries may skew the rankings.