An Alpha Hirogen
The Alpha Hirogen was the title given to the leader of a Hirogen hunting party or pack. The Alpha was seconded by a Beta. If the Alpha Hirogen was killed or otherwise unable to command the hunting party, the Beta Hirogen replaced him as leader.
The first Alpha Hirogen that the starship USS Voyager found was at the Hirogen relay station. He kidnapped Seven of Nine and Tuvok. (VOY: "Message in a Bottle", "Hunters")
Another such Alpha came to know that the Hirogen would die out soon unless he found a way to save them. That came in using holodeck programs to have Hirogen warriors fight holograms and not real opponents. (VOY: "The Killing Game", "The Killing Game, Part II", "Flesh and Blood")
Danny Goldring played the Alpha Hirogen in "The Killing Game", Tony Todd played one in "Prey", and Vaughn Armstrong played one in "Flesh and Blood".