-If we go by dance alone, Taemin, Kai, NCT as a whole for the most part. BTS, Seventeen, Chungha, the last bunch having less difficult dances at times but the execution makes up for it.
-If we add stage presence as a group and overall quality (not difficulty) of choreography Seventeen, The Boyz (Road To Kingdom
,) and Ateez, Monsta X. Maybe G-idle, Itzy.
-for groups in which every individual members' presence/charisma shines massively, often regardless of dance, then Mamamoo, BTS,Bigbang.
(If i were to classify them all anyway. since i see performance as such a wide range of things. But if we go by dance strictly then the first two classes only)