Armorhide

Armorhide figures that the only way to beat the Decepticons is to beat them at their own game. So he's extremely nasty, underhanded, and ruthless to the point of being murderous in combat. This puts him at odds with his teammates and earns him reprimands from Optimus Prime, but frankly Prime can stuff it in his reactor linkage as far as Armorhide is concerned. At least when he's paired up with Bumblebee, the mute Autobot can't raise a fuss.