Comics is a medium used to express ideas with images, often combined with text or other visual information. It typically takes the form of a sequence of panels of images. Textual devices such as speech balloons, captions, and onomatopoeia can indicate dialogue, narration, sound effects, or other information. There is no consensus amongst theorists and historians on a definition of comics; some emphasize the combination of images and text, some sequentiality or other image relations, and others historical aspects such as mass reproduction or the use of recurring characters.
From wikipedia. If a diptych is technically a comic, if a single panel political cartoon is a comic, so are these.
I forgot about Heaven Hunters!!
Here's another one to stay on topic: Gramarye isn't full color rendered goodness, but when it comes to the strengths of a comic - from dialogue to paneling to the use of the medium to things only it can depict, it is god damn amazing.