I would say Baekhyun and the vocal line of BTS voice's touches me the most. Runner ups are Kai and Jihyo...I love Jihyo. The only women that can make me bark for her. Her voice makes me levitate
Touch… as in make emotional/speechless? I’d probably have to say Wheein. She is one of the only singers who’s successfully made me cry from her voice. She’s so emotive when she sings.
I also think both DAVICHI girls are incredible singers. If you like ballads but don’t know their music you should 100% check them out! I recommend ‘Dear’
Oh all of Exo actually I love there vocals in "Don't go" and "for life" they really know how to make me feel the song
Taeil, doyoung, Ten and xiaojun of Nct the vocals especially in ballads OHHHH
Taeyeon her voice is so good especially in "I"
DaVita guys listen to her stuff her voice is amazing especially in "Show me"!
Ateez’s vocal line (they didn't touch me, they punched me the face and left me speechless they're all so powerful)
Siyeon from Dreamcatcher
Taehyun from TXT
BTS vocal line (they yeeted me into oblivion and made me speechless)
EXO’s vocal line
IU
Taeyeon
Kang Daniel
There's lot more but I can't remember, a lot of them left me speechless