Idea #1: I'm thinking I would add a scroll or flourish at the bottom to spruce it up.
Idea #2:
Idea #3: I'm aware the graphic at the top looks ridiculous. I would find a graphic similar to this one in the software I use to cut the vinyl, but for the sake of the draft, I ripped this one off the actual invite I used as inspiration for this sign.
Idea #4: My FAVORITE of all of them.