if you want to portray an image of the wedding and mark the moment, then #1 -- i think the "all eyes on the bride" from the background people adds to the emotion of the moment.
if your going for an image of a beautiful lady, then #3 or #5.
the effect on #4, however, is quite strong and bizarre! like, "what are these weirdos in the back looking at and why are they even here?"
