Dreadlords

Dreadlords are infernal beings of terrifying power, second only to the The Tyrant gods gods. They rule over the masses of fiends through sheer force and terror. They are the generals of the hells and the ultimate champions of their evil gods.
A single Dreadlord set lose on the material plane would lay waste to nations and wage war on all who do not bend the knee. Their power rivals the archangels of the divine, and a group could challenge even a grown dragon.