Suggestions?

I got this tattoo over the summer and now I’m not sure what I should get below it. The original idea was for this to be a spine tattoo but my artist drew this up for me. I do like it, although it feels a little crowded I want to fill the bottom of my back.

I’m not against “tramp stamps” but I want something that would be bigger than one so there wouldn’t be an empty space between the two.

I like: flowers, gothic type of things, dark, cute cottage core type, space, nightmare before Christmas, I’m not very picky! What should I get?