ZAUM first two albums. They've been reproached to reproduce the sound of OM without any original view. I read a few comments in that sense, but I disagree strongly.
The third abum is a let-down though.

https://zaum.bandcamp.com/album/oracles

in those hard times of endless struggle, one's faith is tested, and a prophet will soon come forth to give warning... Phil Swanson has a new album out tomorrow: https://thecultofvestalclaret.bandcamp. ... tal-claret

edit: technically, only 2-3 tracks would qualify as "doom", but thats still Phil Swanson doing an album...

Excellent one-man death doom band here, a newcomer that's only released two pay-what-you-want eps and is already making a big impression:

https://triglathena.bandcamp.com/album/the-vile-silence

I love Acid Bath's two albums, Down's NOLA, Crowbar's self-titled and Odd Fellows Rest and Eyehategod's Take As Needed For Pain. Acid Bath in particular being my favourites. However, other than those major bands I haven't delved much, so I'd like some recommendations!

Check out Grief/ Come to Grief, the doomiest of the early Sludge bands. Mandatory imo.

More recent are both Starkweather/ Croatoan and Fange/ Pourissoir, this latter being very punk-ish, similar to EHG.

I definitely second Grief. I'd also recommend Dystopia for equally miserable sludge.
If you haven't listened to 'em yet, check Melvins and Iron Monkey for more sludge/grunge/noise rock akin to Acid Bath (just with a bit more humor). Harvey Milk and Indian are also essential listening if you need that heavy-heavy shit (I'm talking borderline drone in there).

Can anyone recommend me more atmospheric funeral doom similar to shapes of despair? Preferably with growls and clean vocals. Anything that mixes heavy dismal doom with majestic beauty

Try Colosseum, Remembrance, Lethian Dreams, Aeonian Sorrow.