Probably Chemikal Underground. I haven’t paid too much attention to them in the last few years, which is kinda disgraceful of me but almost from their inception I pretty much bought and loved everything they released.
Edit…not sure why I replied specifically to you beastie…whoops
Ones that have already been mentioned (Hydrahead, Sub-pop, Constellation, Creation, 4AD, Temporary Residence)
I also enjoyed most things Leeds label Brew Records came out with. Their roster included bands such as Humanfly, Blacklisters, I Concur, Chickenhawk/Hawk Eyes, These Monsters, Kong, Nine Black Alps. Good stuff.
Profound Lore
Sacred Bones
Holy Roar
The Flenser
Type Records
Warp
Ninja Tune
Aurora Borealis (I basically buy everything they put out)
Sub pop
Blackest Ever Black
Loads really, but these ones off the top of my head so i guess they would be favourites. A lot are historical.
Ebullition
Witching Hour
Dischord
LevelPlane
SST
Polyvinyl
Prank
strictly no capital letters
Sub Pop
Touch & Go
Riot Season
Hydra Head
constellation
Type
solesides
Warp
SKAM