Michal Karcz: beautiful stuff. Is what gets described as hyper-realist? It's primarily SF but reminds me of Michael Whelan in the 1990s.
Abigail Larson: very cute. Some of it actually caught at my emotions; I really liked "Luca Reptoid" and on second viewing, recognized that many of these illustrations match stories by HP Lovecraft. This hits me right in my sweet spot for illustration styles but I'm not sensing the same versatility shown by some of the other artists.
Larry Rostant: did the covers of a lot of great books. I had trouble stripping the artwork out of the cover, which weakened my view of his work. He seems to specialize in human figures, often off-axis. I'd like to go back and check how closely his artwork matches the author's description of the character, but I don't know if I'll have time. I went online and was able to find some of his work without words sprinkled all over it.
Lars Braad Anderson: only sent in four covers; three were spaceships and the fourth was a gorgeous winter landscape. I looked up his website and saw some really gorgeous work there. I'm currently undecided about whether I should take this into consideration, since it wasn't submitted for official consideration.