Which SME group has the biggest fandom?

Probably NCT/EXO?

It's hard to say in reality, because I often think there is no ELF in sight anywhere I go on the internet, yet when their concerts are announced, the fans totally go out of hiding. ELF are truly magical creatures.

this is just a little trivia but TVXQ was recorded in Guinness Book of World Records as ‘having the largest official -paid- fan club’ back in 2008. Apart from international fan clubs and the official Japanese fan club BigEast; the official Korean fan club, Cassiopeia, had well over 800,000 members. These were insane numbers in a period in which Kpop was far from breaking into the west.

Right now I would say NCT are living through their peak

probably nct. or exo but nctzens are louder than exols.

Well SNSD had all of Korea as their fans so them

Probably Exo or NCT.

how everyone just forgets about tvxq's power, especially in japan.

they were my first thought.

SM is probably the only big4 we can have a discussion over which group has the biggest fandom at their peak. Many strong contenders. The others are too obvious