Neal Adams was the first major artist to make a major impact on me in the late silver, early bronze age and revive my interest in collecting. I would buy multiple copies of his work, not to salt away to sell another day, but to cut-up and create advertisement-free graphic novel albums (who knew that someday all comics, good or bad, would be reprinted in handsome editions, sans advertising?).
These days, the comics market is so saturated with thousands of examples of dynamic storytelling, that some of those from the past may seem a bit lame. But back in days of yore, when something unique snuck up on me in the middle of really lame material, it was pretty electrifying. Among many such examples were the stories illustrated by Berni Wrightson.