Mignola's work is engaging not only because of its graphic brilliance, but because of its wonderful sense of pulpy humor as well. Mezco Toys has been releasing some really nice action figures based on Mignola's Hellboy books, and I have two so far: Hellboy and Lobster Johnson. They're well sculpted and capture Mignola's art very well.
Wouldn't you know it, the coolest figure from the first wave is also the rarest. Behold Kriegaffe, with floating Nazi Overlord's head: