I think theymos should Introduce a new Rank called Legend Pro Max. For the 10k merited Users then you can go on.
Other then Ranks i think in the Profile there should be the Ranking of the profile with respect to activity and the Posts. JJG is going to Hold No 1. Meanwhile Chart Buddy can replace him in Future.
Maybe some adjustments in the ranking could be made in the future when more and more users will get the legendary rank.
I think the rank should be tied more to the activity in the forum, with, of course, some ties to merits, but what defines a user as legendary is the resilience in posting in the forum valuable content, so I guess being activity more difficult to grind rather than merits, should be taken in more focus.