I had a similar question when I was getting ready for a wedding last year. I ended up with a classic tuxedo hat, and it really pulled the look together. If you’re unsure,
https://www.gentlemansguru.com/product-category/wedding-tuxedos/ have some great options that could make your decision easier. I found it helpful to try on a few different styles and see which one felt right. Sometimes, the smallest details can make a big difference.