None of these outfits is bad. My first choice seems to run with the consensus, the 9-11 pants outfit; my second choice is the black suit posted in the replies; my third choice would be the 1-3 dress, but it could become my second choice with the red bag and red shoes, if you wore white or neutral nylons. I'll explain why throughout this post. The other two are also nice, again with the same choice in shoes / bag / hosiery, but the other options will allow you to not have to wear a jacket inside.
I normally think of lighter colors and pastels for a wedding; all of your dresses are black, but the red shoes and bag with neutral or white hose with any of the dresses will provide some color, enough to counteract the solid black look. Black shoes and bag, especially if you wear black nylons, would be too much black when wearing a dress. Does that make sense?
Even though the pantsuit is black, it still looks a little more "upbeat", for lack of a better word, even with black shoes, than an all black dress outfit, which is why that is my second choice, especially with the white top under the jacket, even better if the ends of the sleeves could show beyond the jacket sleeves, but not a problem if the top sleeves aren't long enough. Also, I would wear neutral (or no) stockings with the black shoes, definitely not black. I do like the black shoes as pictured, as the red shoes may stick out with black pants.
This leads me to the 9-11 outfit as my first choice, with the black shoes (rather than the red) as photographed, for the same reason as previously mentioned, with neutral or no stockings. The pattern and the shimmer has a "fun" look (as weddings are supposed to be) and also breaks up the all black look.
I hope you have a good time.
