Green-Eyed Monsters in the Marvel Universe.
- Fantastic Four: This is the reason Doctor Doom hates Mr. Fantastic. He can't stand the fact that Reed Richards is smarter than him, and has beaten Doom every time he has tried to kill Reed and/or Take Over the World. In addition to those few extra IQ points, Reed also has everything else Doom doesn't have, from worldwide respect all the way down to unmarred good looks.
- The Mighty Thor: Loki is Marvel's personification of this trope to the point that he has actual green eyes, and his clothes are predominantly green. His constant envy of his elder brother, Thor, and his need for love from his father warp him into a villain. Most of his mischief is about getting attention and love. His history as an abused child doesn't help. Neither did Odin's blatant favoritism towards Thor. Odin adopted Loki out of obligation and guilt. Ironically he creates his own destruction by doing so.
- Spider-Man: J. Jonah Jameson has both Envy as his motivation and Greed as the vice that leads to the motivation for constantly making Spider-Man's life hell. He's privately admitted that he's jealous of Spider-Man for being so selfless and altruistic in everything he does while Jameson is only concerned with what he can get out of everything he does, so he tries to find or manufacture something, anything to make Spider-Man look worse to make himself feel better. That, and constantly attacking Spider-Man in his newspaper sells massive amounts of papers.
- It should be noted, however, that this characterization was from The Amazing Spider-Man (Lee & Ditko) #10 back in 1964, and has mostly been ignored since then. Most writers depict Jameson as an honest man with a legitimate distrust of people who wear masks, as that can only mean they have something to hide.
- Ultimate Fantastic Four: Rhona Burchill/The Mad Thinker is motivated by her jealousy toward Reed Richards because he got into the Baxter Building Program for Gifted Children instead of her.
- X-Men: During the Claremont days, Storm started getting pretty jealous when Shadowcat (who she saw as a sort-of daughter) spent time with Stevie Hunter.
