MCU Villains

1) Thanos - In the background of the all the MCU to Date and the main character in Avengers: Infinity War.

2) Loki - Thor's Brother the God of Mischief was the main villain of the first Avengers Movie. Has become unclear if he is a villain anymore sometimes helps the good guys when it is convenient and helps him in some way.

3) Kilgrave (The Purple Man)  - Played by David Tennant in Netflix series Jessica Jones.

4) Vulture - Played by the awesome Michael Keaton in 
Spider-Man:Homecoming

5) Kingpin - Appears in Netflix Daredevil series.

6) Ego - Played by Kurt Russell in Guardians 2

7) The Winter Soldier - Again some will say not a villain but if you just watch Captain America: The Winter Soldier he is a the brainwashed villain of that movie.

8) Baron Zemo - does not fight any of the Avengers but sets them against each other, I am hoping this character comes back in future movies. Appears in Captain America: Civil War

9) Eric Killmonger - I know a lot of people will have him much higher on their lists. Appears in Black Panther.

10) Kaecillius - Appears in Doctor Strange.

I know people will disagree with my list that is fine just a bit of fun. Hela and Ultron nearly made my list ;) 

Comic Book Writers

1) Stan Lee 
2) Alan Moore
3) Frank Miller
4) Brian K Vaughan
5) Neil Gaiman
6) Geoff Johns
7) Grant Morrison
8) Charles Soule
9) Chris Claremont
10) Brian Michael Bendis 

Comic Book Villans

1) The Joker
2) Magneto
3) Doctor Doom
4) Loki
5) Green Goblin
6) Galactus
7) Lex Luther
8) Kingpin
9) Penguin
10) The Riddler

Superheroes

1) Batman
2) Spiderman
3) Wolverine
4) Hulk
5) Daredevil
6) Captain America
7) Doctor Strange
8) Thor
9) Iron Man 
10) The Thing from Fantastic Four