The Delors are a family of Sky-Pirates since the Era of the Skylords. They are some of the most wanted criminals in the world and often end up executed publicly.
They are charismatic, and gather other pirate captains around them. Cran Delor I had seven major captains under him, plus Kuze, who had a vast network of underground informants, besides the small army of lesser pirates he had contact with. He used them to strike the merchant fleets, gathering great wealth. When the Skylords were announced, he assumed that he, or even one of his captains would be announced as one of the top pirates. He was surprised when Simoun Simula, and two others were announced. Eventually, he was killed by Shane Revelin.
Such is the life of the Delor Family, and he was not the most powerful.