Chameleon (comics)
Created by writer Stan Lee and artist Steve Ditko, the character first appeared in "The Amazing Spider-Man" #1 (March 1963), making him the first member of Spider-Man's rogues' gallery, based on issue publication date, excluding the burglar who murdered Ben Parker (Supercharger was the first Spider-Man supervillain chronologically). He is also well known to be related to Kraven the Hunter. That revealed relationship helped evolve him as a major villain compared to his original depiction of being just a solo villain in the original issue of "The Amazing Spider-Man".
Hawkeye (comics)
For a time, Hawkeye drifts from one adventure to the next. He attempts to return to the Black Widow and briefly battles her current love, Daredevil. Hawkeye later assists the Hulk against the monster Zzzax. He then follows the Hulk back to the mansion of Doctor Strange, where after a skirmish, Hawkeye joins the "non-team" the Defenders for a short period. He returns briefly to the Avengers to attend the wedding of the Vision and the Scarlet Witch. Together with the Two-Gun Kid and Ghost Rider, Hawkeye defeats the monster the Manticore.