CIS: Gambit
Honorable mentions: Navi
EU: Acend, G2, Liquid
Honorable mentions: Giants, Fnatic, Guild
NA: SEN, NV, 100T, XSET
Honorable mentions: C9, FaZe, Rise
KR: VS, NU
Honorable mentions: TNL
TR: SMB
Honorable mentions: FUT
SEA: PRX
Honorable mentions: TS, X10, FS
JP: CR
Honorable mentions: NTH
LATAM/BR: Nobody
Honorable mentions: KRU, VK, Australs
My own personal list. Made some adjustments after revision.