For instrumental music with no vocals, try: Wide Eyes, Invent Animate (their instrumental versions), Modern Day Babylon, I Built the Sky. These aren’t quite Death Metal, but they have really complex guitar and drum pieces.

For with vocals: Sea in the Sky, Ignea, Unleash The Archers, Corelia (also has instrumental version of their 1 album)

It probably wouldn’t fit your thrash and death metal tastes, but sludge metal and doom metal are a lot less likely to have screaming or annoying vocals in them. I personally really don’t like screaming even though I like metal, haha.

Otherwise, acoustic metal is where you want to land. It can be hard to find in my experience, though.

Anthrax
Haven’t listened to them much in years but I used to like their album, The Sound of White Noise. Singer can be a bit gruff but doesn’t quite scream like I think you are talking about.

Katatonia… Devin Townsend… Hangman’s Chair… Pallbearer

I guess these aren’t really death metal. But they all crush, IMHO.

(I ain’t got much else… I’ve grown to love the growl!)

Just to be clear; are you wanting heavy metal music that’s only instrumental? Or are you wanting heavy metal music where the vocalist doesn’t sound like a small angry demon with a cold that just got karate chopped in the throat?

Animals as Leaders, Thessa, Pomegranate Tiger, Myth of I, and Fractalize are great ones.

Stoort Neer and Vildjharta both have some really good instrumental albums.

Gore., Monolord, '68, and The Damned Things are all a little less heavy than what you might be looking for, but they are all great and have mostly clean vocals.

Polyphia and Chon are also both incredible but probably fall a little closer to something other than Metal.

A lot of metal bands do instrumental releases

https://youtube.com/playlist?list=PLR1qON1IN1zBN4eo7DFL4IYRwZeuKTvWP&si=xY2lo5ha-8070b2P

Give a listen to Testament! IMO the music is thrash so heavy it borders death metal, and the singer ventures into growling only occasionally. My gateway drug into Testament was their Titans of Creation album.

I wonder if AI vocal removal would be able to handle that

Check out Night Verses

There’s a fair few that straddle the line between death growls and clean vocals. Check out Agalloch, Insomnium, Words of Farewell, and Before the Dawn. There’s also of course Amon Amarth, still gorwly but usually clear enough to understand.

I’d start looking up “melodic death metal” that’s a good place to start for what you’re looking for.

Try out Ashenspire, their album Hostile Architecture was my album of the year in 2022. They aren’t death metal per se, but they are heavy as shit. Best description is prog metal jazz infusion with spoken word poetry.

Check out a band called Pelican, especially their early stuff. It’s not exactly what you’re looking for but it might scratch that itch a little

Power metal is more traditional metal but with clean vocals (no growls). Bands include DragonForce, Angra, Helloween, Stratovarius

There’s also progressive metal, where the emphasis is more on the intricate instrumentals, so some banda don’t do growls. It is usually less heavier than traditional metal. Bands include Dream Theatre, Liquid Tension Experiment, Symphony X, Tessaract, Haken, frost*, Porcupine Tree

I was the same when I first started listening to bodom. Just give it time and you’ll like the vocals just as much :)

You can find instrumentals in the meantime, absolutely. (Or even fan covers on YouTube and the like)