A Vermeer is like a faceted stone, draining all the light out of a room and then throwing it back at the viewer. These works, most of them very small, can still dominate a room filled with larger paintings. There are so many theories about how he did it, about what separates him from the many other excellent painters of his time and place. Why are his colors so vivid? Aside from his lavish use of genuine ultramarine, he didn't have anything out of the ordinary on his palette. Hockney can go on as long as he likes about Vermeer's use of optical devices, but at best those could only have been used for the preliminaries, and in some cases their use would have been next to impossible. Light doesn't hold still. The truth is that his methods are well understood, and still, nobody knows. He could do it because he was Vermeer.
I'm also fond of Sargent.