Here’s my vote:
http://amcharts.com/pie/3d-donut-chart/
http://amcharts.com/column/columns-with-rounded-corners/
http://amcharts.com/column/column-and-line-chart-mix/
http://amcharts.com/stock/structured-products/
– OR –
http://amcharts.com/stock/multiple-data-sets/
… though I like the second one better, as you an load a total of 8 data sets into it.