2009-2018 peak / gut feeling, biased towards current gen OU, only counting somewhat regular smogon players, no order because it's impossible to compare :
husk
imperfectluck
panamaxis
Earthworm
Zak91
McMeghan
BIHI
Ojama
BKC
Heist
Jayde
Soulwind
cosine
ABR
Cdumas
FlamingVictini
Nintendi
ben gay...