The 12 main Avengers, particularly from the original and most iconic lineups in Marvel Comics and the Marvel Cinematic Universe (MCU), generally include:

1. Iron Man (Tony Stark)
2. Captain America (Steve Rogers)
3. Thor
4. Hulk (Bruce Banner)
5. Black Widow (Natasha Romanoff)
6. Hawkeye (Clint Barton)
7. Ant-Man (Hank Pym or Scott Lang depending on the era)
8. Wasp (Janet van Dyne or Hope van Dyne)
9. Scarlet Witch (Wanda Maximoff)
10. Vision
11. Black Panther (T'Challa)
12. Captain Marvel (Carol Danvers)

This list blends the original Avengers from the comics (Iron Man, Thor, Hulk, Ant-Man, Wasp, Captain America) with some of the prominent members introduced in later comic runs and the MCU, such as Scarlet Witch, Vision, Black Panther, and Captain Marvel

. In the MCU, the original six Avengers are Iron Man, Captain America, Thor, Hulk, Black Widow, and Hawkeye. Later key members include Scarlet Witch, Vision, War Machine, Falcon, Ant-Man, Spider-Man, and Captain Marvel, among others

. Thus, while the roster has varied over time and across media, these 12 are often considered the core or most prominent Avengers in mainstream Marvel continuity.