Two biographical sources (that differ in a few details) are here and here.
Much of Phillips' work was not in the fadeaway style. The present post presents examples. One consistent feature is that Phillips' subjects were almost always attractive young women.
Had he lived longer, I think it's quite likely that he would have abandoned fadeaway during the 1930s.
Below are examples of his work in chronological order. Click on them to enlarge.
An example of his fadeaway style.
An early non-fadeaway illustration.
A wartime cover including an Army officer.
The Post was the biggest of the big-time illustration holy grails for many years.
By the 1920s even some Life covers were not fadeaway.
Phillips' style is now changing to fit the Roaring Twenties and hinting of Deco and Moderne.
This illustration is less poster-like than usual for him at that time. The client's art director wanted this, and Phillips was versatile enough to deliver.
This appeared one month after Phillips' death. Publication lead times were such that the printing date was locked in before he died.
Also made not many months before he died. I think this was a preview of a style he might had used had he lived longer.