There are over 80 different sub-genres of Metal.
Despite this being a massive insult to metal fans, i understand the power of ignorance is not to be under-estimated.
Educate yourself on a topic instead of stealth-trolling the fanbase behind it.
Linkin park and radiohead is not metal, it's rock....
I don't need to prove shit to people who doesn't even do their own research before asking others to do it for them. Metal is doing fine without you
But seriously though, I don't know much about metal but I know Avenge Sevenfold and from the couple songs i've heard from them its clear it require actual singing talent.