I tried about 3-4 different center-weighted styles during my lunch break. I actually found one that I liked so I'll show photos of that. However, the other arrangements that I managed to come up with weren't photo-worthy.
Also, I've decided that I will leave the large rock flat. I like the amount of swimming area above the rocks and leaving the large rock flat will allow me to have a nice bed of java moss up-top which I think would look great.