Is Garden State a drama? Is Truman Show? Is Big Fish? I'm skeptical about the definition. Dark Knight is more of a drama than any of those, I'd say, regardless of action sequences (although I understand why you left it out, given your caveat). Just because a movie isn't straight comedy doesn't make it drama.

Some of my favorite dramas:

First Contact

Generations

The Wrath of Khan

Insurrection

The One With the Whales

Nemesis