Fantasy Realism and overall winner, imho, Elmore.
Comic Booky goodness, dramatic scenes, crisp lines, and heroicly proportioned figures (for that day): Jeff Dee and Willingham are my tight, tied and close, seconds.
Brom is the furtherest from "quintessential D&D." But he is both foundational and quintessential "DarkSun."
Similarly, DiTerrlizi, while have a bit more work in his portfolio (showing up later 2e, I believe), is not quintessential D&D, but IS quintessential "Planescape."
Imo, neither belongs on the list of options (while WIllingham certainly does/was a noted oversight in such a thorough list).
Easley is an honorable mention (and very recognizable for folks because of all of his hardback manual cover work) but I never much cared for his at once "wispy," while still being "heavy," looking style.