His ability to run his fortune into the ground every 5 years or so makes him the most avengery? With that Criteria Spiderman is a god among men.
The team initially had funding from a trust. I was never clear how that got screwed up. Although Glug slug plug might have to do with it.
As noted below Kylie Jenner is a billionaire Kim can't be far from one if you combine her money with her husbands.
Jan had a fashion design business in the 80's not sure if she still does. Like Tony she did inherit her initial wealth, unlike Tony she never lost it or had her company stolen out from under her.
There is not one document in the MU that we ever saw that did not have Peter' name on it and he used that fortune to bankroll the Avengers for a short time. He had a fortune or his company did he did not pay himself at the outrageous rates of a modern ceo/president.
Based on OP criteria.
Core Avengers
Captain America
Wasp
Hank Pym
Iron Man
Thor
Scarlet Witch
Vision
Hawkeye
Black Widow
Honorable Mentions
Quicksilver
Hulk
Hercules
Black Panther
Black Knight
Hercules
Carol Danvers
Beast
Falcon
Wonder Man
She-Hulk
Tigra
Monica Rambeau
Mockingbird
Sure, Hulk is a founding member, and the perception of him as an Avenger has been perpetuated by the MCU, but he has only appeared in a small fraction of the 1000+ Avengers books, and even fewer as an actual member of any Avengers team. He has honorable mention status only due to his status as a founding member.
Join us at Elemental Inhuman: Crystal Appreciation!!!
Medusa · Black Bolt · Karnak · Inhumans
The first name that comes to me is Hawkeye. Not the real Hawkeye. The other one. Clint Barton.
Bringing back the old, killing the young: that's the Marvel way
Captain America
Iron Man
Thor
Hank Pym (He has had many identities)
Wasp
Vision
Scarlet Witch
Quiksilver
Wonder Man
Hawkeye
Black Widow
“Somewhere, in our darkest night, we made up the story of a man who will never let us down.”
- Grant Morrison on Superman