Human benchmark:
JUHAE [humanbenchmark.com]
CS2:
FACEIT soloqueue [www.faceit.com] / Premier rating around 20k, peak 22.5k (mostly solo q equiv top 4%)
LoL:
MID main (Mage/Assassin), ADC secondary (only if can't play mid) and sometimes autofilled to other roles
wiisli [www.op.gg] solo q
CtchTh3Hmbrgr [www.op.gg] solo and duo q

Apex Legends: Platinum (S10, both splits), first season playing soloqueue - top 6.6% Octane wins (32) in S10
Hearthstone: Peak top 2%