Chameleon

In Marvel's 616 mainstream, the Chameleon is a master of disguise who can transform into anyone. He is the first antagonist of Spider-Man, and is known for impersonating almost anyone.

The Chameleon's real name is Dmitri Smerdyakov, and he is the pupil of the Finisher. He uses a variety of costumes and makeup to hide his identity, including a multi-pocket disguise vest. He also has a face-changing serum, sophisticated tech, and lifelike masks.

In one issue, the Chameleon can change instantly, while in others he has to prepare a mask. If he uses his powers to their fullest extent, he could destroy any Marvel hero.