Yep. They’re on Freeview, but they still won’t grant a national broadcast frequency on terrestrial radio 
VISION adapted from the music of Hildegard von Bingen.
Or just any of the recordings of her music, unadapted.
She was a medieval Abbess, visionary, mathematician & herbal/crystal “healer”.
I think the most important thing here is to disabuse the woman of the idea that classical music is (necessarily) secular. Nobody should be that provincial.
Other than that…
Jesus- The Velvet Underground
Halajula- Leonard Cohen
Jesus Built my Hotrod- Ministry
…ok, I went too far with that last one didn’t I?
Ben Harper just released an album with the Blind Boys of Alabama. There Will Be a Light
These are some awesome suggestions, and thank you all. I meant to clarify that yes, of course there is lots of classical music that would be appropriate. I’m not actually that much of a classical music enthusiast, but was going for what I thought would be a “safe” suggestion for her. I didn’t realize Ben Harper had a new one out, and I love his stuff. Maybe I’ll just make a mix CD of some of the better classical music out there, along with some of the suggested tunes from here.
This woman is driving me nuts with her imperious attitude and refusal to “lie” to telemarketers and salespeople by telling them the minister is not available. Yeesh!
Both Doc Watson and Willie Nelson have released gospel albums.
Oh wait. You said good. Sorry.
I’m not sure Ave Maria would go over well with the Methodist crowd (so to speak). (I don’t know if this is true of Methodists, but the protestants I’ve run across [mostly evangelical fundamentalist, for sure] aren’t hip to the reverance of Mary).
Some more suggestions: Jars of Clay (mostly acoustic-type rock), Michael W. Smith.
An offbeat suggestion: The Blind Boys of Alabama’s Spirit of the Century is a must have (old style gospel).
Anyway, sounds like you’re set.
I would have to say Ollabelle’s self-titled album would work. It’s a jazzy alt-rocky take on classic gospel music. Their rendition of “Elijah Rock” is to die for. I second the Ben Harper/ Blind Boys of Alabama as well. Great album.
Alternately, give your coworker a lesson on the background of some classical music.
But Vision is Catholic! Aagh! It is a very nice cd, though. Don’t tell her the music was written by a nun.
Personal Jesus, Depeche Mode, and that Thrill Kill Cult song where they keep saying “Christian zombie vampires” over and over. 
South Park’s lampoon sounds accurate, but have you ever thought that much pop music sounds like songs of worship? I’ve noticed that many of the sappier pop love songs could easily be made into (bad) praise choruses by the word substitution they talk about. “You’re wonderful, you’re perfect, you are my utter fulfilment, I long for you” etc.
Just a thought.
The Blind Boys ROCK.
Point of Grace has a really nice Christmas album, Christmas Story. Beautiful harmonies.
Why don’t you bring in som U2?