Last edited by Riothamus; April 16th, 2012 at 07:10 PM.
If you read any of the Dresden files, you'll find most powers are what you're looking for, but a few others may not be... though I think Butcher does a pretty good job of explaining how artifacts are created in order to give quick power to someone in a jam.
The reality, however, as tsxhusker mentions, is that fantasy authors use mythologies, folklore and occult lore as jumping off points, be it Judeo-Christian, pagan or other, often a mix as you know, shaping it and changing it to fit the needs of their story. And sometimes those stories are going to employ a good deal of humor about it. So if you're going to see any "inaccurate" portrayal as a blasphemy that you will therefore not enjoy, I would suggest switching over to science fiction most of the time. Or sticking to alternate world fantasies where they are making up something else. But try some of the suggestions and see if any of them work for you.
You may want to give Patrick Rothfuss a try. Not only is he a fantastic writer but his magic system is based on real world physics so it has a certain believability to it. I know exactly what you mean with the magic systems and I struggle with the same thing. The Name of the Wind and The Wise Mans fear may be right up your alley.
While i'm not christian I do feel that hearne in kinda neared [okay half fallen off] the edge with his portrayels of modern religions..
I'm personally iffy on the Iron Druid Chronicles. I do not take lightly to authors spreading potential misinformation about or potentially insulting the name of a deity I hold sacred. The plot of the first book in this regard doesn't seem to rub me the right way.
That doesnt mean I can't ignore it and enjoy the story. but this is one of the few cases where I wouldnt advise you to do the same. there are limits.