I saw that on twitter (@EnigmatikBGDB). According to basketball reference, current PER leaders (excluding guys who played just a couple of minutes):
Paul 31.5
Westbrook 31.2
Harden 30.2
DeRozan 30.0
AD 29.8
Kemba 29.0
Durant 29.0
Butler 28.6
Kawhi 28.2
Curry 28.0
Cousins 27.6
IT 26.7
Lillard 26.4
Hill 26.1
Antetokounmpo 26.0
LeBron 25.4
Griffin 24.9
Whiteside 24.1
Conley 24.0
Wall 23.6
This is not a definitive list of current player value but interesting. I posted this because, for example, I am not a fan of giving Isaiah max going forward, but sometimes we tend to underrate how valuable he is.