The Rat is a great choice. I like the HM-2 for that kind of stuff as well.
I agree - both of these would work. I'd say a Rat is likely a bit easier to dial in for a mix, and there are probably more readily available bass-friendly clones of Rats, but nothing beats the HM-2 for sheer ferocity. And seeing the style you're going for, ferocity may just be the order of the day...
funny i use to listen to stuff like that all the time, but I like the tone in the beginning of this, dunno what effect it is tho probably something simple, back in the day my 8x10 had atleast 5 blown cones which gave me a natural distortion in my punk/metal 3pc band.
Not sure about the current bass player, but Blacky of Voivod used a Rat. The Blower Box was made specifically for his tone, and does a great job of it. It's also pretty affordable for a boutique pedal, with the Deluxe version even better. Either would be a solid choice.
If you want some suggestions, here are some of my experiences for both HM-2 and Rat:
Rat
Magic/Dunwich Volt Thrower - there's even a clone in the classifieds at the moment, I believe. My #1 bass Rat. Tweaker's paradise.
Blue Colander Tremond - my #2 bass Rat. Also quite tweakable, but not quite as much as the VT. Plenty of bass, but can also do high gain.
Frost Giant Bass Mountain - #3, and a bit higher gain/treble focused compared to the Tremond, but lots of overlap.
Fuzzrocious Cat King - this one got a little too gnarly for me, i.e. I couldn't keep enough bass in the mix. But he offers blends etc., and is rather affordable. I had a stock one and was always curious about a blend.
Idiotbox Blower Box - great high gain Rat, the Deluxe is even better. A bit fizzy for my tastes, but it's well-regarded and affordable. As luck would have it, there's also a 25% off sale right now at his shop with the code "HOTAF2024" for everything currently in stock.
HM-2
Boss - Either the OG or the Waza. I just compared mine to each other the other day - I'd say the OG has slightly looser lows and less highs, with the Waza being slightly tighter overall and more treble. But really, both are super close to each other, as you'd expect. The original is my #3, with Waza being #4.
Arion Metal Master - an old clone of the HM-2 that's pretty fantastic! One of my favorites, and affordable when you can find it. More bass/low mids than most clones so it has great definition on the low end. My #2 bass HM-2.
Bear Amps Heavier Metal - boutique and a bit pricey, but absolutely kills it. It sounds underwhelming solo, but in the mix and absolutely stands out and is distinct. I was hesitant at first for this, but it's my #1 now.
Hope this helps a bit!