I think you have a beautiful silhouette! I really like the results of your playing, particularly as you say landscape photography isn't what you normally do. The sky is very nice, and the silhouette against it is lovely. I might try straightening the horizon somewhat, and maybe cropping a little of the water, but I like it pretty much exactly as you posted v2 and v3
By the way, is that South Shields?
I'm no image editor, it's not my forte, but I have posted my take on v2. I straightened the horizon, then cropped a bit off the top and the bottom, to focus attention on the lovely clouds and so the structure sits on the thirds, more or less.