Great construction work !
4 5 and 7 all have strong potential.
I think that 4 and 7 are the strongest still leaning toward 4 as it has a definitive concept or flow.
SOmething to be wary of when working on spaces is the flow of the eye through the piece. 1 2 3 all seem very center specific. WIth elemets that tend to overwhelm the path through the piece . My primary example is in number 2 What I take to be a piece of frame work disrupts the composition unless you want the viewer to focus on that as opposed to the walk way.
You could always thke that frame work element and move it to the right kind of make it frame in your desired shot.
Again #4 is pretty solid.//
I look forward to where you are going with this. Dont hesitate to let me know if you had more questions.
Good work !