In "Starscream's Brigade", he attempts—in what was then only his latest in a series of attempts—to overthrow Megatron as the leader of Decepticons. After being defeated and exiled in Guadalcanal, Starscream finds the remains of some World War II military vehicles, which inspire him to create an army of his own. He travels to Cybertron using the Space Bridge, forcing the guards and eluding Shockwave to do so. He breaks into the Decepticon Detention Center and steals the five personality components of Renegade Decepticons, then installs them into five wrecked military vehicles and they become the Combaticons. The Combaticons (who combine to form Bruticus) and Starscream then capture four Transformers. When Megatron rallies his troops (except the Stunticons) against Starscream and the Combaticons, he deploys Devastator to fight Bruticus, but Devastator is defeated. Megatron attempts to retreat, however Starscream orders Bruticus to capture Megatron and hold him while he gloats and humiliates him. While this is going on, the Stunticons arrive, combine into Menasor and defeat Bruticus. Megatron then orders Astrotrain to exile Starscream and the Combaticons to a distant asteroid. In the next episode, "The Revenge of Bruticus", the Combaticons blame Starscream for their punishment. They imprison him on Cybertron after he abandons them, and plan a devastating revenge on Megatron by pulling the Earth towards the Sun using Cybertron's controls. After proving his worth in helping Megatron and Optimus Prime (who teamed up to prevent the Earth from meeting its doom) stop the deranged Bruticus, Starscream gets restored to Decepticon ranks and Megatron reprograms Bruticus to obey only him.
Grommash "Grom" Hellscream was the chieftain of the Warsong clan , and best friend and chief advisor to Warchief Thrall . He was the first orc who drank the blood of Mannoroth the Destructor ,  thus binding the Horde to the Burning Legion — and he would eventually pay the ultimate price to free himself and his people from the curse.
Garrosh Hellscream was a former Warchief of the Horde chosen by Thrall to replace him in the wake of the Cataclysm , until he was succeeded by Vol'jin after the Siege of Orgrimmar . Throughout the history of Azeroth , few mortals have achieved greater notoriety than him.