A returning fan favorite. Whenever I want to push the bounds of taste or decency in art, I resort to The Glutton zombies.
One of the first OBM (One Big Monsters) featured in Outbreak: Undead. Nothing terribly original in theme, but gives plenty of opportunity for scares when zombies become too easy to handle.
The Frozen zombies are ones that are prone to damage from heat and bludgeons. This remains one of my favorite pieces... it is also probably the oldest image on this site.