What band has a black guy with normally white t shirt on and hes muscular he sings deathcore or hard core metal something?

The band you are referring to is likely "Emmure". The lead vocalist of Emmure, Frankie Palmeri, is a black man who is known for wearing a white t-shirt and displaying muscular physique during performances. Emmure is a deathcore band that blends elements of metalcore and hardcore punk.