The Hulk is NOT in the Big 4. The Hulk, Spider-man, Wolverine, and The Thing have always been and shall always be "guest stars". So never mention The Hulk and "traditional lineup" in the same sentence, please.
THIS is the Big 4.
Here's my favorite Avengers' lineup.
Captain America
Iron-man
Thor
The Wasp
Yellowjacket
Hawkeye
She-Hulk
The Vision
The Scarlet Witch
