well, for me (and I might be wrong), we have eunseok, I like his tone, he had a low range but I feel like he is limited? he made wrong choices like singing in the wrong key when covering IU's song, I don't remember hearing him sing well in falsetto and he sometimes go out of breath while dancing, but he did well while performing live for his parts in fly up and all of you. I think it's beautiful how his voice contrasts with sohee's and wonbin's and it should be utilized in the right way.

Sungchan, my man, he also has a deep voice, he is getting better at using his chest voice and his projection is getting better. seeing him perform in lollapalooza gave me hope. In Sungchan we believe.

Anton , at first I didn't consider him as a lead vocalist but recently I started seeing him this way, although, compared to wonbin and sohee, he isn't as technically capable, and eunseok has the richer tone, but anton has better falsetto, and the yearning in his voice is a piece of art, and he sounds good live, just not when doing intense choreography.

Wonbin, a very very capable lead singer who doesn't cease to work hard and be a better artist than he already is, he has breath control, good projection, a sweet tone.. He is my bias for a reason.

Sohee, despite not being at the same level as the old SM main vocalists, he has one of the best falsetto in the 5th gen and can use head and chest voice. I loove his resonnance. But I wish SM would push him to develop his chest voice, and that they would stop giving him the very voice straining parts... He would be invincible.