In almost all Transformers Generation One-based continuities, Thundercracker is usually the most relatable of the Seekers. In the original cartoon, he was still villainous, but wasn't as stupid and cruel as Skywarp or as narcissistic and grasping as Starscream. In the recent All Hail Megatron comic event, he shows disgust at the experiments that created the Swarm, and saves New York City from being nuked by another Decepticon because the way of the Decepticons is not slaughter, but battle. In War For Cybertron, whereas Skywarp's in-game dialogue is fuelthirsty and Starscream's is all vainglory, he expresses curiosity and wonders at the unusual environs of Cybertron's underworld (apt, as his class for the mission is Scientist). In almost all "character profile" productions, he's usually described as being a reluctant follower who's still around mainly because he believes in the original ideals or because he's already gone so far.
Vezon might count; he's basically an Evil Overlord persona without any of the things that allow either the "evil" or the "overlord" part to work. It's lampshaded with one of the most memorable Crowning Moments Of Funny in the 10 year-plus story, as he disguises himself for a moment as a "Toa (Hero) of Anarchy".