[lazepoo]

If you're trying to go as vanilla as possible, your original option of white shirt/black tie isn't a bad one.

You're pretty limited on shirt options - white is the way to go IMO. I wouldn't go with any shade of yellow because it will make you look jaundiced in all of the pictures, and for ****'s sake, why would you even consider a pink shirt with her dress?

If you're worried that your ensemble is too boring, pick out a good tie and some cufflinks. Take a pic of her dress with you to the store and match it against some ties to find colors that you like that also won't look dumb with her dress. Get one with a pattern, like a light paisley, or at least a little texture to the design. If you're just going to wear a solid color, you may as well save the cash and stick with the black tie you already mentioned.

And don't neglect the shoes/belt. The proper accessories can carry an otherwise average look.