6. Bruticus
Hasbro/TakaraFor all the awfulness of the Unicron Trilogy, there are some things about that trilogy that we can be thankful for. Firstly, the aforementioned stereotype of Jetfire and Optimus being able to combine. Secondly, the Unicron Trilogy gave fresh life into some of the largest characters in the Transformers canon (as seen further on in this list). And thirdly, some of that fresh life was breathed into several combiners, which included Bruticus. The result of the combined Combaticons, the very fact that the Combaticons disguised themselves as army vehicles needs no explanation as to how action-based these characters can be. With that logic, they would surely be a worthy addition to the Bay films.