I'm not sure how you were even able to search by rank/position, when i try this myself it simply returns this,
(Is this feature only available for Legendary+?)
I know that Vod has a lot of statistics about the forum on his site, https://bpip.org/.
I can't find what you want directly on his site (All Hero members/ Legendaries etc,) but you might be able to PM him, i'm pretty sure he has the kind of data you're looking for if you ask him nicely.
I have sent vod a message. Waiting for him to reply.