It’s important to remember when you specify Goetia spirits, if you mean spirits from grimoires, they were described with their offices at a time when the front for all magick was that these were evil beings contrained to serve mankind as the unique creation of God, so attributing anything incredibly positive was less likely, that could also be areason there’s no immediate demon of brainpower (afaik).
If you’re hellbent ( 
) on a demon though, search within this doc for related terms: