His vocal range is amazing. He can go from screaming the highest scream to singing the softest note and have it sound perfect

anything involving singing the softest note is gay and sucks.

One of his favorite bands to Hopesfall, Across Five Aprils, Unearth, Bleeding Through, Every Time I Die etc.

your boyfriend has a crappy taste in music.

He wants to keep up with the times and do something the kids will enjoy and something they can dance to and have fun with.

keeping up with the times is a bad idea. "the times" are currently defecating a horrid amount of boring, useless, completely shitty music.
and if he's going to be in a band, he should forget about what "the kids" will enjoy and play what he enjoys(even though it's probably gay)