There is another great one by Matthew. Commercial (though only barely, as it is very cheap).
Btw, now you can also order a custom theme from him exclusively for yourself, if you wish to have that kind of luxury. 🙂
Matthew’s blog: http://logicproxthemes.blogspot.fi
Matthew’s thread at GS: http://www.gearslutz.com/board/logic-pro-x/885002-logic-pro-x-api-theme-pro-8.html
Chandler theme (click photo to zoom in):