As Wikipedia indicates, Graves checked off many boxes on the "artistic temperament" list. One he didn't check was that of Starving Artist, because his works seemed to have sold well and he was able to buy property and houses in various places over his career.
Although he was a modernist, he did not embrace abstract art. However, his subjects were subject to distortions and embellishments of modernism. As for those subjects, they often were birds, and he is probably best known for his bird paintings. Some examples are shown below.
First, two paintings made a decade or so after his most characteristic bird images.
This painting features brushwork that's much stronger than Graves' usual rather wispy style.
Here is a more classic Graves bird image.
In New York's Museum of Modern Art collection.
The white calligraphy is similar to what his friend Mark Tobey would be doing in the 1940s.
Another classic bird image, now in New York's MoMA.