Gfriend, MMM and OMG managed to chart well, however not even at the same time.
Um Oh Ah Yeah was pretty big even before Gfriend's peak. Then Rough and You're the best both smashed domestic charts almost at the same time. It was RV the group that wasn't doing that well by that time.
But anyway, I think bgs were the ones that had the hardest time to stay relevant. Ikon, Winner, Pentagon, Monstax, etc etc. All of them are pretty much forgotten now.