Everyone uses the azaleas, if you use the sweet olive bushes your town will really standout, not to mention that it will match the gold roses. Maybe use white azaleas bushes and sweet olives, it would make the pink flowers standout because they will be the only pink thing.
White/pink azaleas and pink hydrangeas. I'm not sure about sweet olives but they probably look good when not in bloom because the bushes are of lighter color.