Looking for a Wordpress template to integrate CiviCRM
Assuming you are using the latest and greatest Civi and Wordpress - most themes should work fine. 

There was an issue with backbone conflicts that may have caused issues with some themes- but that was addressed in 4.7.31. Outside of that - I never had an issue with the CiviCRM backend when using any front end theme. However, I have had conflicting CSS on the front end that can typically be fixed by changing some lines in your CSS.

As for what theme I use - a modified version of twentyseventeen.