Your best bet would be to look over here:
http://www.wowinterface.com/downloads/cat106.html
This is an entire category dedicated to minimalistic UI's. Although I don't use them myself, it's probably the best place to start in terms of finding a UI best suited for you. While they're aren't too many UI's that are based around a single class, most -- if not all -- of these UI's should work fine with a Rogue.
Hope this helps. Happy hunting!