1.Thanos (Avengers: Infinity War and Endgame)
Did you actually think that anybody other than the Mad Titan could be my top choice for favorite villain? Thanos has become popular that he is now being described as this generation’s Darth Vader. He was such a good villain that one of my biggest fears with the MCU going forward is that they will not be able to replace him.
In terms of qualifications, he really has it all. He can take down anyone physically in the MCU, which includes the Hulk. He’s ruthless enough to kill his stepdaughter just so he can acquire an Infinity Stone. And he’s determined enough to actually accomplish his goal, which was to wipe half of all life in the universe. All these reasons are why I have him as my favorite villain in the MCU.