With the introduction of achievements, why not have a HoF which showcases - 

1. The first person to max the that achievement 
2. All persons who have maxed the achievement in order of when 

Obviously do not include anything sensitive such as net worth or, if in the future, reaching certain battle stats. 

The only issue I have with this sort of thing is that it constantly loses value over time. I've no particular issue adding additional Highscore leaderboards in future though.