Another broad category next to Action is Adventure and comics found a natural home for titles like Adventure, Amazing Adventures and Bizarre Adventures. Not to mention Adventures of Tintin.
There are certain limitations to the 2D medium; Meryl Streep can take a break from funny accents to go whitewater rafting and make that the whole movie, but try going on for even a couple of pages of the protagonists doing nothing but hurtling through rapids. It doesn't work. But we should all have such limitations because comics show adventure:
though there are problems with the adventure tag here. There is no risk if you can bend rifles and bullets bounce off you, and adventure implies risk.
No matter how exotic the locale there comes a time when the threat of a corrupt cattle baron becomes de rigeur to a western and not at all a feature of adventure.
Even a character like Dr Mid-nite, who can only see wearing night vision goggles; once the reader is used to seeing him out with his fellow mystery men, the adventure aspect is blunted.
Challengers of the Unknown, by their name alone, are tailor-made for adventure. And Carl Barks' run on the Disney ducks is graphic adventure par excellence.