That is a truly great selection of illustrative images.
Though, post #87528 fits just as well in the third group. (Panels 2 & 6 and 3 & 5 are close in color to each other but still unique).
And I'm not sure what to do with post #756903. It's like what I was looking for but not quite. There's a clear split of characters into themed duos.
Hmm... Still drawing a blank on a good name.