I did some searching for you in the plugins repository and found several scoreboard or leaderboard plugins that might work for you. They are mostly geared for sporting events, but the functionality should work for your purposes. You can read details and reviews at and see if they will do the trick:

https://www.ads-software.com/plugins/search/scoreboard/
https://www.ads-software.com/plugins/search/leaderboard/

Good luck!
-Shaynald