Most people typically say that Giro's are more oval, though I assume you've tried several Giros in your search.

Honestly I think the one in your picture seems to fit fine. I understand the "dorky helmet look" feeling though. I don't think anyone thinks they look particularly good in a helmet.

I will say I did notice a difference in fit and perceived appearance when I went to the $100-150 range from the $30-45 range. I think it has something to do with them being more individually sized, with more ventilation/styling (particularly in the front and back), more shape of their own (rather than just a circular mellon), and less exposed foam.

If you haven't looked at the higher end helmets it might be a good idea to look at them even if they are out of your budget (then, if you find one, keep an eye out for 40-50% off sales which pop up from time to time, especially online).

You may also want to look at mountain bike specific helmets, a relatively new design range, they tend to cover lower on the back of your head and have a different overall shape profile.

Three harder to find brands that I can think of you should see if you can't find are: Specialized, Lazer, and Rudy Project though I've only tried a Specialized myself (and immediately purchased it...).