Board Thread:Questions and Answers/@comment-30744559-20170925201216/@comment-4851935-20171202101047

Morgoth is probably the most evil villain in all of fiction. He created the concept of discord, all evil creatures, plunged the world into darkness (more than once) and wished to initiate the apocalypse and destroy all good in existence. He is bascically Satan.

A villain that can compete with him is Nyarlathotep. Nyarlathotep also wishes to bring destruction to the World and he enjoys torturing and manipulating humans, and driving them insane. It is likely he will end up destroying the world. The only reason Morgoth is more evil than Nyarlathotep is because Morgoth created evil. Nyarlathotep did not, his father Azathoth did (unintentionally).

Palpatine has done loads of evil things. He turned heroes into villains, destroyed the Jedi Order, spread war throughout the galaxy and ended up ruling the galaxy with an iron fist. He killed (or was responsible for killing) billions. However, his goals only affected one galaxy, not the entire universe or multiverse or omniverse.

Unicron, on the other hand, wished to consume the entire universe in order to find peace in absolute nothingness. However, he didn't cross the moral event horizon as much as Palpatine did.

Bill Cipher destroyed his entire dimension and everyone in it, including his own parents. He manpulated Ford into creating a portal between his dimension and the human realm. Once he entered the human dimension, he caused chaos and "weirdness", capturing people and turning them into a throne, imprisoned Mabel in a prison that fed off of her fantasies and generally wrecked havoc. He was willing to kill children and wished to expand his chaos over the entire multiverse, create a "fun" world without rules or restriction, and rule all of reality and existence. That makes him comparable to the most evil villains in fiction, even though he isn't quite as detestable as Morgoth or Palpatine or Nyarlathotep or even Unicron.