Saint Vitus?
I would not say so. The only song that might be "Christian" is "Prayer for the (M)asses", however it sticks out from their discography like Black Sabbath's "After Forever". I can see why you might say that though, some of the lyrics on the first two albums feel like they're written from the perspective of someone who is struggling to be "good" but can't, hence the "doom", and uses a lot of religious imagery (ie "White Stallions"). My interpretation is that the vast majority are mostly ambiguous negativity (ie "White Magic / Black Magic"). Also they don't really appear after Reager's first exit and are not on really in any of the lyrics to Die Healing. Here's Dave Chandler's recollection, "We weren’t going to be a Christian band like Stryper, but we didn’t want to be like Venom, either".
Anyways, on topic, I love Paramaecium's debut album.