I'll be honest, I never was a bridezilla. However, every bride wants to stand out and be pretty on her special day. If you use a vintage wedding dress, it will be unique. There are also so many styles and time periods to choose from, you're sure to find something you like. The cost is often less than some brand new dresses, which is an added bonus. I've found three different styles on Etsy on Zibbet to use as examples.
This one is for sale by
TheWitcheryVintage on Etsy. According to the information it dates from the 30s/40s, and has the elegance you see from that time period.

This is a wedding dress from the 70s by
posypower on Etsy. It would be lovely for a wedding in nature.

This is a stunning vintage beaded wedding gown by
Artemis53 on Zibbet. Almost makes me want to get married again, but to the same guy of course.