Transformers, More Than Meets The Eye

Great DI find here. Awesome vintage T-shirt featuring the Transformers logo, Optimus Prime, Bumblebee, and....I don't know who the other 2 are. I always was more of a G.I. Joe fan.  Don't get me wrong, Transformers are pretty sweet.  Does anyone know who the other Autobots are on this T-shirt? (Sorry if the picture isn't too clear)

Total cost: $2