You can use :

DdmrDdmr   thread Bitcointalk Merit Dashboard

and his link to his app.

Link:  BitcoinTalk Merit Dashboard   

Or

Piggy   thread  Top 30 Merit givers per board - Interactive Tool to spot possible Merit Sources

and his app.

Top 30 Merit per board: https://albertoit.github.io/Visualization/MeritTreemap/index.html