The trick for the charts may be to use a
dummy series and then Copy–> Paste Special + Formats. I've used column charts here.
The original data is used in each chart for Series 1. Series 2 will be the highlighted point.
[TABLE="class: grid"]
<tbody>[TR]
[TD="class: xl66"]Chart 1[/TD]
[TD="class: xl63"][/TD]
[TD="class: xl63, width: 64"][/TD]
[/TR]
[TR]
[TD="class: xl64"][/TD]
[TD="class: xl64"]Data1[/TD]
[TD="class: xl64"]Gradient[/TD]
[/TR]
[TR]
[TD="class: xl65"]Alpha[/TD]
[TD="class: xl65, align: right"]7[/TD]
[TD="class: xl65"][/TD]
[/TR]
[TR]
[TD="class: xl65"]Beta[/TD]
[TD="class: xl65, align: right"]3[/TD]
[TD="class: xl65, align: right"]3[/TD]
[/TR]
[TR]
[TD="class: xl65"]Gamma[/TD]
[TD="class: xl65, align: right"]4[/TD]
[TD="class: xl65"][/TD]
[/TR]
[TR]
[TD="class: xl63"][/TD]
[TD="class: xl63"][/TD]
[TD="class: xl63"][/TD]
[/TR]
[TR]
[TD="class: xl66"]Chart 2[/TD]
[TD="class: xl63"][/TD]
[TD="class: xl63"][/TD]
[/TR]
[TR]
[TD="class: xl64"][/TD]
[TD="class: xl64"]Data1[/TD]
[TD="class: xl64"]Gradient[/TD]
[/TR]
[TR]
[TD="class: xl65"]Delta[/TD]
[TD="class: xl65, align: right"]17[/TD]
[TD="class: xl65, align: right"]17[/TD]
[/TR]
[TR]
[TD="class: xl65"]Epsilon[/TD]
[TD="class: xl65, align: right"]15[/TD]
[TD="class: xl65"][/TD]
[/TR]
[TR]
[TD="class: xl65"]Zeta[/TD]
[TD="class: xl65, align: right"]12[/TD]
[TD="class: xl65"][/TD]
[/TR]
</tbody>[/TABLE]
Chart 1
1a – A normal column chart is created. I've set the gap width to 70%.
1b – Series 2 is formatted.
1c – Series overlap is set to 100%.
Chart 2
2a – A normal column chart is created; gap width to 70%.
2b – Select the chart with the correctly formatted point, Chart 1c here, and copy it. Then select the chart you wish to change. From the Home tab on the ribbon, use the dropdown menu below the large paste icon and select 'Paste Special'. In the popup dialog, select 'Formats' and press OK. The results are as shown below.
To copy the gradient fill to a cell interior fill would require some VBA. It would be faster for me to set the cell fill manually than to write the code.