Marvel Comics Shockwave - He was the most effective in actually getting things done.

beast machines megatron <_<

My personal favourite would be Starscream, however brief his reign was :D

 

I have to go with Marvel Ratbat though. He has the track record others can't beat.

starscream skorponok and shockwave

starscream skorponok and shockwave

 

...and everyone else on the Orient Express.

I think this topic proves why Megatron is so great. The obvious answers here (excluding some of the comic characters that I'm not as familiar with) are Starscream and Shockwave but it's hard to pick one or the other. Starscream is very passionate but his aptitude isn't what it should be. Shockwave is logical but doesn't have the fire that a great leader needs. Megatron embodies the best of both. He is the ego to Shockwave's superego and Starscream's id. Or, if you'd rather think of it this way, the Kirk to Shockwave's Spock and Starscream's McCoy.

 

But if I have to choose, it's Shockwave. Starscream's a better character but never actually proven himself competent in battle.

I think Starscream is an Autobot spy anyway.

Shockwave for me I guess I don't know much on the others anyways.

Marvel Comics Shockwave - He was the most effective in actually getting things done.

i agree he was very effective.