Marvel Supervillains are a dime a dozen. And humanity’s greatest line of defense against them are the Avengers. But these Marvel supervillains are so good even the Earth’s Mightiest Heroes had trouble dealing with them. These supervillains are absolute monsters in terms of brains and brawns.
They are always three steps ahead of the Avengers. The Marvel heroes could never know what hit them.
Let’s start with the obvious choice. The most famous Marvel supervillain at the moment, Thanos has faced the Avengers more than once in the comic books. And many times, he has done what scores of villains banding together have not been able to. Thanos uses both his brains and brawns to take down Earth’s Mightiest Heroes.
The Infinity Gauntlet is the perfect example. In this storyline, Thanos gets his hands on the six Infinity gems and uses them to erase half of all lif in the universe. But Thanos does not stop there. With the power of a cosmic God, he faces the Avengers, the X-Men and many comic entities. He defeats them all on his own.
The cyborg known as Korvac is from another reality who comes to the mainstream universe and gains immeasurable power. He first absorbs the power of the Grandmaster, an Elder of the Universe. Then he shifts his focus to Galactus and absorbs his Power Cosmic. His ability to analyze and adapt to any form of energy makes him a formidable threat.
The Marvel heroes band together to put an end to Korvac’s reign. But Korvac has so much power he defeats all heroes without breaking a sweat. Then the cyborg realizes his actions and commits suicide. Before dying, he restores to life all the heroes who were killed.
Robert Reynolds has the power of a million exploding suns in his veins. That makes him probably the strongest Marvel hero in existence, surpassed only by a select few. But the incredible power he has comes at a price. Reynolds has two psyches vying for control. The benevolent Sentry persona’s noble deeds are balanced out by the chaos of the malevolent Void persona.
The Void is generally sealed off deep within the Sentry’s mind. But it is far stronger than the Sentry when it is in control. During the Siege arc, the Sentry almost killed the entire team. Supervillains like Apocalypse acknowledge his strength and is the reason why he was later resurrected as a Horseman of Apocalypse.
The Ultron A.I. is undoubtedly one of the biggest threats the Avengers have ever faced. No other Marvel supervillains have come even close to breaking the Avengers the way this guy has. Because he has been around for so long, Ultron has beaten the Earth’s Mightiest Heroes more times than we could care to count.
It’s not just the Avengers he has defeated. Even the Fantastic Four and the Inhumans have fallen prey to his wrath. In the famous Age of Ultron arc, Ultron was handed the Avengers such a devastatingly humiliating defeat that they had to travel back in time to undo it.
At first glance, Taskmaster seems like a meagre threat. But his unique copycat skill makes him the perfect opponent to take down the Avengers. And he has actually done it in the past. The Avengers square off against the Taskmaster when his clone ratted him and his villain training facility out.
In his very first few moves, Taskmaster takes down Ant-Man, Yellowjacket, and The Wasp. The rest of the Avengers attacking his facility are also easily dispatched. the only reason he lost was Jocasta – Bride of Ultron. Taskmaster never had the time to study Jocasta’s fighting abilities so she managed to be the wild card that pushed him into the back foot.