Jehu was the most cruel king.
Jehu Eyre died in 1781.
Jehu Baker died in 1903.
Jehu Jones died in 1852.
Jehu Glancy Jones died in 1878.
Jehu Amaziah Orr died in 1921.
Jehu Davis died on 1802-05-11.
Jehu Grubb died on 1854-12-10.
Jehu V. Chase died on 1937-05-24.
jehu
In my view it is king jehu, but Herod to fits the bill.
Jehu was a king of Israel who reigned in the 9th century BC. He is known for executing a coup against the ruling dynasty and for carrying out a purge of the Baal worshipers in Israel. Jehu's reign was marked by violence, but he is also credited with restoring the worship of Yahweh.