Hook, Line, and Sinker

Comic Bio (US):

Hook, Line, and Sinker were the three loyal servants to the Unicron of our dimension. The trio's first depicted mission for their master was to capture an alternate dimension Galvatron who had already helped Unicron destroy Cybertron and conquer Earth. This particular Unicron simply plucked Galvatron from one of his future possibilities to use in his gambit against the Cybertron in our dimension. Hook, Line, and Sinker defeated Galvatron while he was engaged in battle with a team of resistance fighters, both humans and Autobots, giving the alternate dimension Autobots and humans a chance to reclaim their world. Galvatron agreed to obey Unicron but secretly vowed to play the game by his own rules.

Later, Galvatron went deep into Cybertron, and surrounded by Primus's essence, was shielded from the watchful eye of Unicron. Again, Hook, Line, and Seeker were sent to retrieve the errant Galvatron. This time, however, they were not able to defeat him so easily. Enraged from the earlier humiliating encounter, Galvatron mercilessly crushed Hook, Line, and Sinker single-handedly in order to regain his freedom from the clutches of Unicron. [Ed: Technically, Galvatron only killed Sinker. He tricked Sinker into killing Line, and Primus finished Hook.]