Helstar

Nosferatu is the only one of theirs I’m familiar with. But it’s great. Any other albums of theirs worth a look?

I'm mainly familiar with their 80s stuff.

The first 3 albums are more in the USPM style.

As you've heard, Nosferatu is kind of a neoclassical power-thrash.

From what I've heard, they adopted an even heavier/thrashier direction on later albums.

The only albums I am familiar with are Burning Star, Remnants of War, Nosferatu and A Distant Thunder.  Burning Star has a few good songs (some great screams) but is mostly NWOBHM in style.  Remnants of War is heavier (still has some cool screams) but was not that popular.   Nosferatu is when they really came to life with the neo-classical speed-power thing.  And if you like Nosferatu, A Distant Thunder is similar but more accessible (there's even a Scorpions cover) and not as consistent overall.

I've not really investigated their other albums.