Hirogen
The Hirogen are a nomadic species of hunters who have been found across the Delta Quadrant, with some factions separated by thousands of light-years. They view other lifeforms as prey and treat them as such, with little distinction between sapient or non-sapient species.
Political Structure
The only Hirogen met by Starfleet have been part of hunting groups or packs, often of just one ship and sometimes with crews as small as two. When hunting a particularly challenging prey, multiple ships may come together to form a bigger pack. The leader of these groups is referred to as the 'Alpha', who has absolute authority and is supported by the second-in-command, the Beta. It is unclear on what basis the Alpha and Beta are chosen, but likely force of personality and a demonstrated talent in the hunt are as important as experience. This will also affect how long a larger pack will stay together after a hunt for this challenging prey is concluded.
Nothing is known of any hierarchy or authority beyond these individual groups. It would be a mistake, however, to assume they have no sense of cooperation or larger infrastructure, as the USS Voyager encountered a sensor network that reached from the Delta Quadrant to the outer edges of the Alpha Quadrant the Hirogen operated and controlled. This requires those Hirogen to dedicate significant time and resources to something that benefits the whole of their people and aids their cooperation, while denying those individuals the chance to pursue hunts of their own.