I think I'm going to go with Wheeljack
He is not only a scientist and engineer, not a capable warrior. He was the one who created the Dinobots, at least in G1 continuity.
The Transformers Prime version of Wheeljack is fairly awesome as well. Less of a scientist, more of a warrior, but I still like him.
Other favourites:
Soundwave
Perceptor
Shockwave
Ratchet
Tigertron
Grimlock (except for the movie and subsequent seasons, where he was changed from being a powerful asset if a bit primitive and unpredictable, to a liability who acted like a young child and required babysitting.
He is not only a scientist and engineer, not a capable warrior. He was the one who created the Dinobots, at least in G1 continuity.
The Transformers Prime version of Wheeljack is fairly awesome as well. Less of a scientist, more of a warrior, but I still like him.
Other favourites:
Soundwave
Perceptor
Shockwave
Ratchet
Tigertron
Grimlock (except for the movie and subsequent seasons, where he was changed from being a powerful asset if a bit primitive and unpredictable, to a liability who acted like a young child and required babysitting.