92. Parallax

Nevermind that he looks like a really pissed off cockroach, this sentient organism made of fear is responsible for turning one of DC's most beloved heroes into an intergalactic mass murderer.

The original storyline to position Green Lantern Hal Jordan as a villain was so controversial (in a good way), that it was repurposed by writer Geoff Johns as means to re-invent Jordan's brief but bloody reign as Parallax.

Originally designed as a creature to be more monster than symbiotic threat, the thing evolved into a major player, especially in the events making up the Sinestro Corp's offensive. The evil fear monger's new license on life has continued to engage fans by contributing consistently satisfying drama to the epic universe that belongs to the Green Lantern Corps.