When it comes to "characters" from the movie universe... there aren't a whole lot who stand out since very few of them ever got characterisation in the stories which otherwise tended to focus more on the humans. The Autobots too often were portrayed as sidekicks for Sam and the US Army, and the Decepticons were villainous/monstrous set pieces offering little for audiences to empathise with. Heck, I felt a greater emotional connection with "Handles" from the latest episode of Doctor Who than with any Decepticon from the TF movieverse!
So drawing from this rather limited pool...
> Bumblebee: yeah, I know he's one of the most over-merchandised characters in the films, but I'm just looking at this purely from the movie/story perspective and ignoring the toys/merchandise. Needless to say that Bumblebee was one of the few Transformers characters who actually got any form of character development, so it's not like he has a whole lot of competition.
> Optimus Prime: see above.
> Sentinel Prime: I liked how they took the idea of introducing Sentinel Prime, which had me thinking he'd be like an Emirate Xaaron or Alpha Trion style mentor character for Optimus Prime, but then turning that on its head by making him a traitor. Not too shabby.
Shockwave
The Fallen
Ravage
Dispensor.![]()