As I've often said, I have a nostalgic fondness for the old pulp magazine artists - even though they were active long before I was born. They had to work under very tight time constraints, with practically no reference material and for little money, but sometimes produced really great stuff. One of the best was Rudolph Belarski. This one is espcially nice, with the ghostly shades of dead aces saluting the fallen:
This is by another favorite, Frederick Blakeslee:
