Ma'alefa'ak J'onzz.

Zorx, Klax and Jennifer.

Melvin Sneedly as the Bionic Booger Boy.

Carl, Trixie and Frankenbooger.

Justice Lord Green Lantern.

Justice Lord J’onn J’onzz.

Dawnbreaker.

Brainiac.

Thaddeus Thawne/Inertia

Frankenstein’s Monster.

The Riddler

I also forgot to mention Annihilus.

Ronan the Accuser originally wore green

Mandarin originally wore green, sometimes he still does

I'd say Loki. But he's technically not a villain anymore.

Wat Tambor

Isn't Ganondorf green?

Greedo

Boba Fett (although he did redeem himself)

Jabba the Hutt

Demogoblin has green skin

Zamasu

@Jordan isle

Loki technically isn't a villain anymore.

Loki is a villain mostly

Not in the current continuity. He did redeem himself.

Scourge the Hedgehog

Loki has entered the chat 🤣

Chick Hicks