Personally, i am unfortunately totally ignorant to the wedding culture. I am somewhat embarrassed to say that I have never been married nor I have ever attended a wedding ceremony. I have no idea what goes with what and what music is normal. So I have no input based on experience.
That being said, if I were to create something somewhat original, I think some type of grand church organ music is good. Something big with bass. Grand church organs in Europe have a nice bass and sounds wonderful. Also, a type of music with royal trumpets is good too with the organ. I personally would hire a classical style composer to create the original composition. Yes, there are modern composers out there who compose music in the style of classical music. This is true. So an original composition of large church organ and trumpet music would be on order.
Slightly off the subject, I would also add visuals. I would add a release of wild doves and a torch lighting ceremony where a runner would run from a few miles away and carry a torch and light a large fire from his torch to add to the music. IMO, this would be a wonderful wedding and hopefully mine.