Changelings of a Different Form

The Changeling. No, not Garfield Logan, but the other two... Gregor Nagy and Erik Razor. Both men also had shape changing powers like Logan caused from accidents. Yet unlike Gar, they used these powers for evil. At least for a brief period before they become they both passed away.

Gregor Nagy was the son of Dr. Jan Nagy, a scientist who was a friend of the Earth-One Superman. When the doctor passed away his will bequeathed guardianship of the lad to Superman, who adopted Gregor. However, the boy had pent up resentment towards his step father, blaming him for his mutated condition. Eventually, he realized the noble nature of his guardian, and used his powers to save a submarine, losing his life in the process.

Erik Razor was a convict sentenced to death by electrocution. However, the electrical charge had instead mutated him into a shape changer. Beginning a new criminal career adopting various animalistic forms, he had to battle Earth-Two's Flash time and again. Eventually, while the two battled undersea, Razor ended up suffocating in the form as a shark.

As for the most famous Changeling, himself a boy whose life was saved by becoming a mutant himself, Logan found a counterpart on Earth-Two in a lad named Slim who like Garfield could assume various forms and like him was a member of a doomed patrol. Logan made a true name for himself as a member of the Teen Titans.