along those lines, a custom night guard would be the middle ground that offers some protection, as they intend to protect from grinding, but not so bulky that it prevents you from speaking (and probably cant take a full hit]
google and you'll get many hits.
Online services for about $100 to $200 have options for uppers or lowers and sometimes have different densities for you to eval the tradeoffs of protection vs encumbrance.
The more custom you pay, the closer of a fit it will be and least noticeable and least likely to interfere with speaking. This is in comparison to the semicustom $30 diy units you'd get from the drugstore and selfmold and trim to fit at home.