Makes perfect sense :) 

Well I have a few links:

1.http://heartgrenadethemes.tumblr.com/sweetheart 

2.http://sleepythemes.tumblr.com/post/8389365349/obscurity-preview-code-three-column-grid

3.http://sleepythemes.tumblr.com/post/8019312516/ambiguity-preview-code-optional-three-column

4. http://sleepythemes.tumblr.com/post/6597099146/constraints-preview-code-3-column-grid

5.http://sleepythemes.tumblr.com/post/6976094030/centre-preview-code-2-column-grid-display 

6.http://www.tumblr.com/theme/28863

7.http://www.tumblr.com/theme/23941

8.http://www.tumblr.com/theme/17581

9.http://www.tumblr.com/theme/16246

You can always customize them. The first few don’t really look like your kind of style, but like I said you can always customize :)  

There is also this website - http://tutorialsandmore.tumblr.com/ 

it has html codes and other junk haha. I hope I helped :D If you don’t like any I can always help and search :)