The only time I have a UV filter on my lenses is when I think I might need it for protection of the lenses front element, say walking through the bush or similar. There are some that say that a filter in a shot such as yours will contribute to extra sun spots. You are either going to have to shoot for the foreground like you did or the sky. This is the kind of shot that would lend itself to shooting two exposures and blending them to get more of both the foreground and background if that is what you want. You are shooting virtually directly into the sun and while it is viewable with your eyes our current cameras can't record this onto a single image. If you wanted less sun spots in the second shot, being at more of an angle to the sun would accomplish this, the first one seems to be fixable with a couple of issues and blending them as I mentioned above. Knowing how to do decent selections in post processing would be an asset in this one as well.