Martin Li (Earth-4678)

Martin Li, nicknamed by the press as Mister Negative, is the founder and owner of the F.E.A.S.T. homeless shelter. Secretly, he is the ruthless leader of the Inner Demons who has the ability to harness negative energy at will. Li had a personal vendetta against Mayor Norman Osborn, which leads him to terrorize New York City. Following his defeat, he became a member of the Sinister Six, organized by Doctor Octopus.

Source

 * https://marvels-spider-man.fandom.com/wiki/Mister_Negative