GG Allin's music doesn't get nearly as much attention as his stage antics, but this song in particular is actually kinda good. Its production is garbage, but given the genre and the person who made it, that shouldn't be surprising.
There's an Iron Maiden that came before the more well known Iron Maiden. Pretty good if you like hippy rock.
Orange Goblin's great.
Saviour Machine is a cool if you want something slow. They do ballads and epics about the Bible with gothic metal and operatic vocals. I doubt gothic epics being unpopular in the Christian scene is surprising.