how to add a picture for each series in a chart

We need more information about the type of chart, where the picture should appear in relation to the chart and the series.

You can use pictures to fill a column or bar chart.
You can use pictures as data markers

you can use a second series on the secondary axis. You can set the fill picture of each point in the logo series.
In the example I used the shapes you had as an example.

You need to set both horizontal axes to have the same minimum and maximum values.
A custom number format will remove the negative values from horizontal axis.

Only thing you can not remove is the left most grid line

That would only be dynamic if you ran VBA code to update the fill picture.

If you want a dynamic solution then just use VBA to size and position images. Not sure what you would use in terms of an event in order to update existing images.