Here is my rolling list. Fix it, add to it, perfect it.
Based on best comic/cover art work to represent the mcu movies.

1. Iron Man
2. The Incredible Hulk
3. Iron Man 2
4. Thor
5. Captain America: The First Avenger
6. The Avengers Avengers #1 (1963)
7. Iron Man 3
8. Thor: The Dark World
9. Captain America: The Winter Soldier
10. Guardians of the Galaxy
11. Avengers: Age of Ultron Avengers #57 (1963)
12. Ant Man Marvel Feature #47
13. Captain America: Civil War
14. Doctor Strange
15. Guardians of the Galaxy Vol.2
16. Spider-Man: Homecoming - Ultimate Spider-Man #90
17. Thor: Ragnarok
18. Black Panther
19. Avengers: Infinity War