Chameleon (comics)
The Chameleon was born a Soviet citizen named Dmitri Smerdyakov (Дмитрий Смердяков). In his youth, he was a servant and half-brother to Sergei Kravinoff and eventually became a minor associate to Gustav Fiers. Although Dmitri and Sergei were friends, Sergei was often abusive to Smerdyakov, leading to a combination of admiration and resentment towards Kravinoff. Eventually, Smerdyakov emigrated to the United States of America. As he had made a talent for himself during his youth, impressing his brother by impersonating friends and neighbors, he assumed an even more impressive disguise: the identity of Chameleon. During his first known criminal outing, he impersonated Spider-Man, though he was exposed and arrested. Shortly afterward, Kraven the Hunter himself came to America, and the Chameleon set his old associate's sights on Spider-Man. Both men became long-time enemies of Spider-Man, part of his primary rogues' gallery.
Pantheon (Marvel Comics)
Agamemnon, a half-human and half-Asgardian god, is born immortal. Although he never physically ages beyond the age of 16, the Pantheon are all his descendants. Stationed in the Mount, their headquarters in a Nevada desert, the Pantheon recruits the Hulk as a member and ally after he is transformed into the Merged Hulk persona. The Hulk accepts the offer as a means of making up for the damage he's done in his Savage Hulk days. The Hulk works with the Pantheon on many rescue and relief missions, the focus of the Pantheon's purpose. In return, several members help the Hulk out with personal missions, which sometimes dovetail into the Pantheon's intended purposes.