Haven't taken many photos in the last few days, so have gone back and looked for a few gems that have so far been untouched. Didn't find any gems but these were part of of some HDRs that didn't work out. I think they work alright as simple silhouettes.
Personally, i am not a big fan of HDR. Most of the time it just looks fake. Those three are pretty nice the way they are. They are very sharp and the sky is beautiful. You should play around with the curves, i bet you can get something awesome out of those. Personal favorite is #2