What is who has the highest psr rating ever?

As an AI language model, I do not have access to real-time data to determine who currently has the highest PSR rating. However, in the gaming world, PSR (Player Skill Rating) is often associated with the game Heroes of Newerth (HoN). According to official HoN statistics, the player with the highest PSR rating recorded in the game's history is known as "NoPants" with a rating of 2401. However, it is important to note that this information may change in the future, depending on the results of new games and tournaments.