Its to small... it needs a little wall, and this wall needs something long or more horizontal space taken up. maybe you could add a plant to the side of it, and put a picture above, this would help a lot.

what about a mirror above it? then maybe the lamp will look ok.
could you try removing the other 4 items; and put 1 large item instead--such as a bowl, or decorative box?
or instead, could you set it up as a bar--with glasses inside, and a couple nice decanters on top?

Have you thought about placing a clock over it?

http://deciture.com/marco-polo-wall-clock/

http://deciture.com/oversized-wall-clock/

Hope this helps you!

I like the idea of setting it up as a bar! Perfect!!! Then find a fun vintage vino sign or make one maybe.

My only other thought was to just place a nice big low green plant on it.....the design fights with pictures and the lamp, being taller, fights with it, too.

Nice piece! Enjoy it!