'Twas a dark and stormy nightcap
Drama is yet another in a long line of types that is not as easily definable as first made out. Decried in the platform of soap opera mocked for its earnest attention to serial implausibility.

Or placed on the pedestal of Greek thought. One extreme to the other. Like the other genres and features of comic book art, drama is underpinned by considerations of what went before and
pinned down by the expectations of the audience, the critics and the press.

It is more than counting - or identifying - the dramatic moments in Terry and the Pirates and still short of the momentum that can carry To Kill A Mockingbird or Twelve Angry Men.
There are some things better left to other media.

That said Stan Lee (and Don Heck?) knew what he was doing when he created an armour-encased hero called the Invincible Iron Man, whose very strength is interlinked with his greatest weakness; an injured heart kept beating by the same technology as the suit.

You could go as far as saying that the Marvel empire was built on drama. Every other feature was already present in some degree. But you can see the DC characters gaining a personality as the decade rolls on.