Below are eight artsy WordPress themes I've gathered off of several theme sites. I chose what I thought were the prettiest themes. I've included the PR of the download site as an indication of credibility. Some of the themes are free; some aren't. Some of the themes are mobile device compatible; some aren't.

I haven't tested these themes, so I don't know if they actually work or are compatible with the latest version of WordPress.

1. Theme: vector-flower Free download pr4
   
2. Theme: Craftwork Of All Time Free download pr4
   
3. Theme Artwork Free download pr4
   
4. Theme: Sky $39 purchase pr0
   
5. Theme: Woway $45 purchase (this theme is mobile device compatible) pr0
   
6. Theme: Daisho $45 purchase (this theme is mobile device compatible) pr0
   
7. Theme: Indeziner Free download pr0
   
8. Theme: Watercolor Free download pr0
   

You might consider the Affordable Website package if you need a WordPress theme setup for you along with hosting, a logo, email list, SEO and support.