The Groo Adventurer - Sergio Aragones

I always liked this series about a completely inept and moronic barbarian brought to us by the margin filler of Mad magazine, and this collection is a good enough introduction. I suppose it was always doomed to fail in a medium of superheroes, but the tales are really clever and, other than Evan Dorkin, you won't find another artist who spends so such energy making inconsequential background worth dwelling on.