I just wanted to add - that if you are looking for more dramatic lighting (usually around sunrises and sunsets), you must go out in the dramatic light, or create that lighting yourself (much harder with this subject matter).
I favoured shot 3 basically because the sky wasn't doing anything for me here... But if the sky was colourful and full of gorgeous clouds....another story. You can create that sky in photoshop, but personally that's not my thing. so If I'm out at the right time and the sky is boring, I usually include less of it in compositions.
Hope that may help.
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