You know the one. TFA series 3, the autobots find themselves magically (or not so magically as it goes) turned into humans. Take any transformer from any continuity - which pitiful fleshling would play their Human self? for example: i reckon G1 Hot Rod would be played by Tom Cruise from his Topgun era.
Optimus Prime as either Peter Cullen or John Wayne. Megatron as either Hugo Weaving or David Kaye. Yes, I'm unoriginal. But they are what I think of now when I think of those characters (Frank Welker too, but I identify with him far more as a sinister voice behind a chair, and a single gauntleted hand).
Didn't we have a thread eerily similar to this? Oh, here it is. About a month old, but I think it still holds pretty true. http://www.tfw2005.com/boards/trans...81-transformers-their-human-counterparts.html