Doug: I am going to request that today's answers be supported with some rationale based on dastardly doings that fell within our generally accepted parameters of 1970-85 (if you're new, we've had this dates conversation several times). For example, ol' Norman Osborn's Green Goblin could be at the top of someone's list because he killed Spidey's love, Gwen Stacy. That's pretty awful, hence it could surely qualify GG on a heinous "best" list. So give us some additional fodder for consideration after you make your nomination. Oh, and just because a particular devilish plan was thwarted should not keep us from talking about the intent of the do-badder.
Doug: And of course by now everyone (say it isn't so if you have not!!) has seen the second Captain America: Civil War trailer. It is a feast -- I am really excited for this flick! And, how about the reference in the clip to the cover featured below? How cool is that?