Here's Dennis Miller Bunker's "Portrait of Anne Page." This full image is one that I pulled from the web, and does not do the portrait justice.
it's the hands that reveal the true mastery. They reveal a subtle variation between warm and cool color and an incredible economy of brushstroke.
The roses also showcase this delicate and simplified brushwork.
Here's another by Bunker, "Wild Asters." This overall shot is another that I pulled from the web. The colors in all of the reproductions I have seen do not come close to the warmth of the actual painting.
Notice how much warmer and more diverse the colors are in the detail shots we were able to capture.
Here's John Singer Sargent's "Robert Louis Stevenson and His Wife." Far more impressive in person, and so very different from the portrait work he was doing at the time.
Here you can see how thinly and fluidly he painted Stevenson, almost effortlessly conveying his features.
In contrast, Stevenson's wife is painted with thick and scumbled dabs of paint.
Here's Sargent's "Capri Girl On A Rooftop." In reproduction, it looks rather detailed.
Close shots reveal the simplicity of the figures.
And here is one more by Sargent. A close up of a "Portrait of George Henschel."
Here is William Merritt Chase's "The Song." Establishing photo is not mine.
Another great one to see in person, so that you can see the simplicity of the brushwork.
Next is Frank Benson's "Summer Day." I've always loved this piece. His brushwork is rich with broken color.
And finally, Gary Melchers' "The Embroideress." I was not familiar with this piece, and was blown away by it. I once again pulled this overall shot from elsewhere.
With the detail shots, you can see the thickness of the paint.
The hand is especially interesting. A complete contrast to the one I shared by Bunker, and yet no less stunning. A vibration between warm and cool colors, and it appears that he may have used black to turn the fingers from the light and fade the tips into the background.