Scratchy/screamed vocals are only a thing in certain subgenres. Power metal (the subgenre Dragonforce mostly belong to), for instance, tends to have much cleaner vocals, though often the lyrics are equally difficult to understand because half the bands aren't native english speakers. Something like Gloryhammer is a decent modern example. As for technical skill, I'm no expert, but Galneryus strikes me as decent.
Scratchy/screamed vocals are only a thing in certain subgenres. Power metal (the subgenre Dragonforce mostly belong to), for instance, tends to have much cleaner vocals, though often the lyrics are equally difficult to understand because half the bands aren't native english speakers. Something like Gloryhammer is a decent modern example. As for technical skill, I'm no expert, but Galneryus strikes me as decent.