A nice Excel sheet looks fine and you can import basic graphics into the spreadsheet itself but with InDesign you can create an entire template that surrounds the spreadsheet.

Learn how to make custom templates in Microsoft Excel to save you time and effort when creating similar reports or spreadsheet data analysis ...

Step-by-step tutorial on creating an analytical dashboard in Excel that updates automatically using a pre-designed template or from scratch.

Learn how to make a flowchart in Microsoft Excel without using any external add-on - but with SmartArt Graphics or Shapes Tool.