Calling all Florists

Or at least people who know about flowers, because I am not one of them. I've been tasked with designing/setting up the centerpieces for the wedding I'm attending on Saturday.  

Here is my inspiration - sweet and simple.

We'll be using red bark as the greenery in tall vases. What I need is a recommendation for blossoms that float well. I personally love ranunculus but am open to other ideas.  

Here are some of my other favorite blooms.

Help! - oh, and thanks in advance. I promise to take photos of the winning suggestion.