Pericles Junior - I don't know much about this amazing artist, but I think the picture can speak for itself. A great picture, be it photo, painting, drawing, tells a story, without even having to say a word. This one certainly does. (Also, best name ever!)
Melissa Ballesteros - there's a profusion of this kind of stylized art (I often think of it as DC Animated U-inspired), and it certainly holds up the notions of detail removal and abstraction that a lot of formal comics theorists put forth as the reason cartooning communicates with us. But just because one abstracts art doesn't mean it's guaranteed to communicate. Ms. Ballesteros' art does.