As non-4th gen boy group fans, here's how I see these boy group tiers from my perspective which is from sales wise. And obviously, a lot of groups didn't make it onto the list.
Impact wise or charting wise, I don't know who's doing the best both domestically and internationally.
S Tier = Stray Kids
A+ tier = Txt
(3 million sales)
B+ tier = Riize
(1 million sales)
B tier = The Boyz, Boynextdoor
(Pass 500k sales)
C+ tier = Cravity, Oneus, P1harmony, Epex
(Pass 200k sales)
C tier = Ab6ix, Verivery, Cix, Wei, Xdinary Heroes, Onf
(Pass 100k sales)