staircasewit posting at
snowglobe has a great eye for capturing character. Check out their
Orphan Black and
Amy Pond icons for some great examples.
I've recently begun to notice
quixotic's work at
malagraphic. Really love the clarity and richness of detail. This is a perfect example:

easycompany posting at
easystreet does some amazing stuff with saturation and detail. Their icons are so crisp, and there's always such movement and drama. My particular favorite is
all of the Being Human UK series. Flawless set.