Magneto vs Starscream
Starscream starts in jet mode, in low orbit.
Master of magnets vs a big metal robot. Sounds like a mismatch.
Except Starscream has the NULL-RAY. Renders all electricity intert in one shot, be it Transformers or human.
We'll just ignore all the times it didn't work like that on Megatron as PIS..
Starscream also has a hell of a longer range then any human, and can fly in space.
Who wins?