Demoriel's seal
Demoriel ("blood and the lion") is an emperor and the king of the North. He has at his command 400 great dukes, 12 chief dukes, 600 lesser dukes, and 70,000,080,000,900,000 (or 700,000,800,000,900,000, sources vary) servitors.
Each of these dukes has minions to 1140, the more significant task you put before the duke, the more he'll be his servants.