Awesome bit of rock "trivia." I put it in quotations because I do not consider knowing that to be 'trivial.' I always leaned towards the songs that seem to have the underlying spirit of love behind the lyrics and believe there's a strong argument it manifests from an underlying faith in the true Original source, whether consciously or subconscious. There are a million love songs but few performed with 'real love' (won't somebody shoooo(h)ow me, real love, isn't anyyone truuue anymore?!... real love!....re(h)eal luuuohovve...-another good Firehouse song).
Other cool stuff
Many know the guitarist of Korn got saved many years ago. He even wrote a book about his experiences. Lesser known is the bassist also got saved, later on.
Alice Cooper was raised Christian by a minister. He believed all through his fame he still was a Christian, but it wasn't till watching a Billy Graham Crusade on TV, in the 90s, he realized how far he had fallen away. He rededicated his life to God that night.
Peter Sandoval, Amazing drummer of the openly satanic band Morbid Angel (from the 90s) got saved years later, after the band broke up. I have seen video interviews of him confirming this and openly discussing his faith.
Ones I've not confirmed, but have heard...
Peter Criss of Kiss (cat faced drummer) is purported to be a Christian.
Stephen Harris, bassist of Iron Maiden is supposedly a Christian.
There were claims Tom Araya, bassist and vocalist of Slayer, states to be Catholic, but I've heard his religious views in a video interview and they did not really line up with his claims. I wonder if, coming from a Hispanic background, he just sticks to that line as many of them do. But he's of Chilean descent so not sure if that's as common with them. His views sound more self stylized than Catholic.
Kirk Windstein of Crowbar began making claims of being born again, and even reflecting spiritual beliefs in his lyrics, but videos I've seen of him don't support this. I suspect it may have started out true, but he never sought out to be taught, so he just continued many behaviors under the belief he was saved. A pity he never sought out a church or anyone to learn from.
Thats all I can think of off the top of my head.