Combine two charts

Now I want to combine both graphs so that the Min to Max Graph is in the back with only the orange bars layerd ontop of the black bars. Is that possible?

Yes, it is possible. I am not sure where this fits into your project, but what I see in your description is a "box plot" (no whiskers). Your current chart is a stacked bar chart, which is the standard way to generate a box plot (before 2016 made a built in box plot option which I am not familiar with). See this tutorial: https://peltiertech.com/excel-box-an...ams-box-plots/

In your sheet, I:

1) Copied B1:C1 (T and C) and pasted into G1:H1
2) Copied "start min" (B4:C4) and pasted into G2:H2
3) Entered a formula for "start med" in G3 =B2-B4. Copied into H3
4) Copied "End Med" and pasted into G4:H4
5) Entered a formula for "End max" in G5 =SUM(B4:B5)-SUM(G2:G4) and copied into H5
6) Selected G2:H5 -> Insert -> Stacked bar chart -> Switch row/column (and any other data series fixes I need).
7) Format chart as desired.

My approach here assumes that this is the final product, but I actually suspect that the data in B and C are coming from somewhere else, so it might be better to base the formulas in G and H on the actual source data and not the summary in B and C.

And is there a way to write the true headers next to the bar charts? So T and C instead of 2 and 1?

Note that in my approach, Excel automatically chose to use row 1 (G1:H1) as the category axis labels. In your original charts, you are telling Excel to use row 7 (A7:O7) as the category axis labels. A bar chart (with a category axis) will use whatever text you enter into the range designated as the category axis labels. Your charts are using 1 and 2 as the category axis labels, because those are the values in A7 and B7. If you want T and C to be used instead, either enter T and C into A7 and B7, or point the category axis labels range to be B1:C1.

Does that help?