There is a metal band called "Stryper", came out around 2001 - they are technically a Christian heavy metal band - but not all of their songs are theology based - but they are all clean.
Since you mentioned "Veggietales", I thought this might be a band you'd be interested in.
And here is a link to a site which checks out the latest Christian metal bands (and even gives their genres)
Heaven's Metal I cannot endorse any of the bands on this site - 'cause I don't know any of them! But I am familiar with Stryper - and I kinda liked their stuff, but they may not be as "hard metal" as you're looking for.