Some of you guys have true taste.
Seconding Superhuman, Weeekly's After School, StayC's Stereotype (though I think this one did okay), and Beast's Beautiful Night.
Kind of like Weeekly's After School, Shine was beloved by I-FANS, and while it helped Pentagon gain some attention in Korea, it did not propel them into stardom like it should have. Though, they did have that Dawn scandal immediately afterwards so....who knows what could have happened.
Secret helped build WJSN's Korean fanbase, but it did not do much on the charts.
I'M OK was a banger and right after Love Scenario. I don't know what happened there.
I'm a GOT7 fan, and even I didn't like their music from 2017, so I get why they lost a lot of casual listeners during that time. But Look and Lullaby were great songs and completely against the whole "GOT7 have terrible songs and noise music." Lullaby specifically was pretty public friendly. Look peaked higher than any GOT7 song digitally since Hard Carry, and Lullaby started trending after a group performed it on Road to Kingdom. Alas, was not meant to be.