Tapered Teeth: how can I improve my smile? (Photos)

I had jaw surgery to correct a severe underbite several years ago, along with braces which closed (or at least reduced) many of the gaps between my teeth. Whilst I am really pleased with the results, I was wondering what could be done to improve the appearance as I am still completely confident with my smile. I notice in particular that many of them are tapered, preventing a ''full smile''. Would veneers be a simple solution?