Although he's not everyone's favorite tone, the fanbase does acknowledge Chen as the best singer in the group in terms of having breath control, technique and range. He beat all of them when they did a contest to hit the lowest note + belt the longest
but in terms of tones, D.O is the best and then Baek.
Chen has the range, technique and breath control.
Baek has the range and breath control.
D.O is great at vocal acrobatics/runs/riffs but if he goes too high, his neck veins start poking out and he begins to crack lol
