That's a really good article, and seems to be pretty accurate. They do have the Leopold Delta Point Pro on the list though, and that one definitely does not have the Shield SMS footprint.
I'm guessing you have the Shield Plus that comes optic ready. If so, you can get a Trijicon mounting plate specifically for the Shield (not 100% sure about Shield Plus though). Here is a link to the plate on Trijicon's webiste (google the SKU # AC32091, and you will be able to find it for around $80)-
https://www.trijicon.com/products/details/ac32091
There is also this one from Trijicon that supposedly works for the optic ready Shield Plus (among other firearms)- (SKU # AC32092)
https://www.trijicon.com/products/details/ac32092
Maybe give them a call to clarify which one would work better for your Shield Plus