Megatron the Loser
I can't deny that somehow Megatron's personality was probably blended into Cobra Commander (aside from Starscream). Megatron did show moments of cowardice and the trademark "RETREAT" statement whenever things fell out of favor and both of them had traitorous deputies. Cobra Commander had Destro, Megatron had Starscream. In fact Megatron's personality was a total clash to his Galvatron personality that when Serpentor arrived in G.I.Joe season two to replace Cobra Commander, it was if Galvatron and Megatron were now separate beings. Hee hee. Now just enjoy Megatron as he shows crazy moments but they aren't as crazy as Galvatron's (whose personality was integrated into Serpentor).