Novelty/Bragging Rights Leaderboard

I think it would be a cool feature to have a leaderboard for arbitrary first and/or most gained achievements for currency, bosses, or other benchmarks.
Essentially for each league these achievements would be attainable by only 1 character each, at the beginning of the league for first and the end for most for example.
A few spit-balled ideas:
- Exclusive cosmetic upon achieving the first/most for any given league (Hideout decoration, cape, etc.)
- A small amount of points for the MTX shop for each achievement completion
- Displayable through character API to see on 3rd party sites to view builds
This wouldn't be a game changer whatsoever, just another instance of one of the small things that make a game stand out while also throwing a bone to some of the most dedicated players