- Morgoth. The equivalent of Satan in Tolkien’s worlds, he is the only person who truly was capable of destroying Middle Earth alone.
- Sauron. Like Morgoth, he’s extremely powerful, so much so that it took an army to defeat him alone.
- Makuta Teridax. As a leader of villains, he is unparalleled, constantly manipulating and planning, with plots deeper than the Pit. He is even more powerful after seizing control of the Matoran Universe, becoming capable of destroying whole planets.
- Moff Gideon. As a military leader, he is very much a dangerous person, and would easily have gotten all of Mando’s friends killed if it wasn’t for Luke Skywalker’s intervention.
- Director Krennic. One of the few Imperial leaders in Star Wars who has a very good motivation in Rogue One, as he believes that he can keep control of the Death Star, despite it promptly being stolen by Grand Moff Tarkin by the end of the movie.
- Darth Vader. He’s a classic villain, and is crazily OP. Also, he’s just really enjoyable in everything he appears in, since he can beat up practically any character in the Star Wars movies.
- Ultron. Honestly, if it wasn’t for his trying to destroy humanity, Ultron would be more of an anti-hero, since he believes his actions to be those necessary for the protection of Earth, whether or not they will protect people.
- Megatron. The only reason he’s ranked so low here is because I’ve never really followed the storylines of Transformers, so I don’t know too much about him. He looks pretty cool, though.
- Venom. Venom is very OP, due to his shapeshifting abilities and being capable of possessing others. In my opinion, his appearance in Spider-Man 3 was the best movie version of him so far, though I’m intrigued by his brief appearance at the end of Spider-Man: No Way Home.
- The Evil Group from Rastan (or was it Nastar??) A generically named group of villains who you have to kill in these classic arcade games, they are very bizarre, and have very strange dialogue, due mostly to terrible translation to English.
Some honorable mentions:
Galbatorix, and most of the characters of the Inheritance Cycle. For some reason, most of these characters seem utterly unable to provide any real ending to the story, instead leaving it on a cliffhanger as the main character, a significantly OP guy who’s close to being an antihero, flees the known world to protect it from himself.
Kylo Ren. An absurdly useless villain, who accomplishes nothing except killing s bunch of people and blowing stuff up. His whole character really just feels like the “teenager with anger issues” trope, after giving the guy a lightsaber.
Palpatine. After Episode 9, he’s just way too powerful. He should have been kept dead.
Mutran: a psychopathic scientist who will willfully harm others, he’s honestly a very dangerous person in Bionicle. He’s also quite creepy.
The Mouth of Sauron. This guy is just creepy.
The Nazgûl: these are some of the best villains in the Lord of the Rings, as they are faceless, and can only die if pierced by certain ancient weapons or if the One Ring is destroyed.
Bo Katan Kryze: I just find her very annoying. We have too many people who think that the galaxy (or a certain planet) would be better off under the rule of militaristic extremists like her Death Watch and Nite Owls allies.
Boba Fett: mostly because he’s never really a villain, though he’s a bounty hunter.
The other bounty hunters from The Empire Strikes Back: all of these guys should have had more screen time. They have some wicked cool ships, and require me to share a small joke here:
In the scene where Han Solo docks the Falcon to the Star Destroyer’s command section, an Imperial officer makes the comment, “No ship that size could have a cloaking device.” However, one of the bounty hunter ships, the Mist Hunter, has one, and it’s parked in the landing bay downstairs. It’s a scene that is rather funny, given that this info was only made after the fact. I don’t think it was intentional at the time, given that the Mist Hunter wasn’t even shown in the movie.