Perhaps the medal would be more fitting if it worked like...
Rename the current Best Player medal to, 'Level Dominator'.
Create a 'new' medal based on some top rated lists.
Level (overall top 250), Richest, kill streak, Bounty Hunter, Rising stars, Arena, SE kills and PvP smasher.
Call this one 'Best Player'.
So essentially at midnight ST the game would take a reading of these lists, if each list has a different leader, no BP medal tick for anyone.
If a player manages to become top of more than one, while no other player has, player gets BP medal tick.
There should never be 'joint' best players. So if Player A was top of two lists and then Player B become top of 2 other lists, no BP tick would be had until only one player dominated again.
I think this would be a more fitting solution to the 'term' best player. It would also make adding some more top rated lists have a little more point. Top Fragger (most fragmented items), Top inventor, Top DQ'er etc etc.
The more top lists for this system the better IMO. Make the best player truly need to be a jack of all trades and highly active.