There will be other posts going up before this that I can’t see but I want to say to ZK that I’m not sure about your answer 100% because it almost sounds like going around to different rabbonim to be “satisfied” with the answer. I know that’s not what you intended but that’s what it sounds like to me.
In my opinion, what determines who is a godol is who goes to this person and how many shailos he is asked. If a person answers questions for the people of his shul and no one outside that sphere, then he’s a great LOR, but not more than that. If he answers questions from other rabbonim and people on a wide scale, then that qualifies more as a godol.