Hmmm....
Some more from old english.
Dightner = Manager (from dight (diht) meaning dictate)
So maybe Landsdightner or Rikesdightner or Statesdightner.
Hātanera = Commander/ caller (from Hāt, meaning spoken/call).
Really deep we might conjure up Ombight which meant official. So Overombight, or Firstombight Highombight etc....
Or if one wants to get even more political. ..
FirstThegn , thegn meaning originally 'servent'.
*bites tongue*High Reeve. Was the term for the ruler of 'free english Northumberia', after they lost their King.