Dan Thompson! I've been looking at a lot of this master colorist's work lately; it's the perfect blend of drawing, color, and paint application (in my opinion). Check out his stuff: http://danthompsonart.com/
Between looking at Nelson Shanks, Dan Thompson, and my teacher, Vilas Tonape (a master in his own right), I'm getting very interested in color and its many applications in portrait painting (or in any kind of painting). So in this painting below I'm really trying to see as many colors as I can and touch upon them, though there are still many I haven't yet visited. This lighting set-up was ideal for catching those warms, cools, and the interesting colors in-between.