What bands you have you find to sound good?
Since Metal is a genre that excels in extremes; extremes of distortion, complexity, volume, emotion etc., it's difficult to judge what sounds 'good'. How to tell the difference from a bad sounding performance recorded well from a good sounding performance recorded badly? Some quite excellent contemporary 'metal' albums, from an aural perspective, are little more than modulated pink noise. I'm always a bit wary of judging a recording (of any genre) to sound 'good' or 'bad'. My only criterion is do I want to hear it again ...
I've never considered myself much of a 'Metalhead', but being of an age where my formative musical tastes were heavily informed by Deep Purple, Black Sabbath, Groundhogs, Hawkwind, Led Zeppelin, Alice Cooper, Pink Fairies when they were new and interesting, my biases are probably for a sound somewhat reminiscent of early 70s 'Heavy Rock'. Black Sabbath's
Masters of Reality and
Sabbath Bloody Sabbath are really 'good' sounding albums to me in different ways. As is Deep Purple's
Machine Head regardless of what you think of
Smoke on the Water the 'rolling truck stones thing' and 'a few old beds' sure sounds fine to me.
For me, (Heavy) Metal proper started with Blackmore's Rainbow in the mid 70s. But the first Rainbow albums sounded like they were recorded in a toilet and were pretty naff yet the contemporaneous Sex Pistols sounded fantastic and Punk in general was much more interesting. So I lost interest in anything Metal for several decades.
For some contemporary stuff that I enjoy (whether you consider it metal or not) I would suggest:
Flickering Resonance - Pelican
The Film - Sumac & Moor Mother
Langt, langt Vekk - Kanaan
Death Hilarious - Pigs Pigs Pigs Pigs Pigs Pigs Pigs
Muuntautuja - Oranssi Pazuzu
Ilion - Slift