First. Please do not flag as opinion based. I'm looking for facts.
In that thread someone mentioned, that Vin Diesel is not an A-list actor because he is:
.... But he is a niche actor, he's not got the breadth of roles I would expect an A lister to have. With the exception of Riddick, it's hard to credit him with all of the draw on the box. He doesn't have the kind of draw or range that someone like DiCaprio or Will Smith have, that's all I was trying to say. If you google "a list actor list" there's even a scroll bar of them, that doesn't include him.
Since Vin Diesel is a "niche actor", he is not an A-list actor. According to that premise.
But. For example, Jim Carrey is a niche actor as well. He - besides of a few exceptions like The Number 23 (2007), plays mainly in comedies and always the same goofy guy.
But since he is a "niche actor", he would not be an A-lister.
And even though, he is not part of that (top 10!) list, Vin Diesel, with total grossings of more than $5 Billion with the Fast and the Furious, Guardians of the Galaxy and Riddick, has to be specified as a bankable star as well. But not as A-lister?
As reference someone mentioned the google result of "a list actor".
But does google create the list now? Or who does? When does an actor become an A-lister? After $10B grossing? $100B? If he played more than just the same brawler or goof? Even tho he is super famous for this role and made billions at the box office?
And to take another google result:
Liam Neeson. Adam Sandler. Kevin Hart. Melissa McCarthy. No A-list actors?
To keep the original question:
What makes an actor an A-lister?