Look into some of Handel's arias. He's got some gorgeous ones that would be perfect for a church setting. Other than that, a good composer to look into is Faure, who has also done some oratorio type settings.
I'd love to hear your voice! I'm sure its beautiful =]
^ The singer's wedding anthology is great, and generally full of a variety of styles available to you.
Panis Angelicus, Bist Du Bei Mir, and Du Ring an Meinem Finger are probably good places to start. Also, which Ave Maria did you sing? There's several, most of which are very popular for traditional roman catholic wedding services.