How about 'God Boy' - easy to remember, people know the expression, depending on the music and how you present the image and lyrics it could be used as a double meaning - not just a bible believer but as a superhero deity? IMagine the flyer, a cartoon image of a kid in superman pose dressed in a white sheet with a halo on - priceless!

Not big on things biblical but there are some cool angel names here:
http://www.esotericarchives.com/solomon/nameindx.htm