Those last 2 are very nice. The very last has more drama, but I would loose the guy for a serious image. Maybe if you put the unseen plane further behind, coming around the bend from the mist you even have more drama. You might try to slightly blur the front plane by making an animation of 2 frames with motion blur, but only slightly moving the camera forward a meter or so, so the rest of the image stays sharp. A workaround of course, but it might work.