I use Amazon music HD, the paid one. It works for me. I don't really look for new metal that much. Usually my music choices are influenced by whatever concerts I'm going to see in the future. But the options are unlimited and I could play a different album forever on Amazon and not have to repeat them ever.
Death core bands, a few of them will release their albums with singing and full instrumentals. Shadow of intent, Lorna shore.
Body count just released an instrumental version of their newer album.
Oceans are Alaska
Wet Ass Plutonium - Nuclear Power Trip 👈 these aren't metal but something worth checking out on YouTube.
Mastodon, I enjoyed their set more, and I wish Lorna shore would have gotten a full hour..
Amazing stage show special effects or whatever you want to call it, I was on shrooms for that show..