4. Trypticon
If you are not familiar with Trypticon, he was a huge dinosaur robot created by the Constructicons. Trypticon was the main command base for the Decepticons and acted as a weapon for the Decepticons during their continuing war on Earth with the Autobots. Trypticon had three modes of attack. He could form a city, a mobile battle station and the Godzilla like form that we are used to seeing. A Transformer with brute force that could easily walk into battle and leave a path of wanton destruction, Trypticon was a foe not be taken lightly. Michael Bay is always noted for gigantic explosions and destruction in his movies and Trypticon is just the character needed to add a new level of mayhem and destruction, never before seen in this Autobot/Decepticon war. It is also always good to have a multipurpose team mate on your side when heading into battle, especially one that can act as your command centre and battle station.