king of all one surveys

noun1

1. •
   Possessing governing authority over a range of territory; having decisive control or oversight over all major matters within one's ambit of influence; having a satisfying position of respected leadership or comfortable prestige.

   • Let the world without go as it may, let kingdoms rise or fall, so long as he has the wherewithal to pay his bill he is, for the time being, the very monarch of all he surveys. — 1819