This list is a great start. I think you should add most beans, hard wheat(need grinder), rolled oats, pasta, white flour(yes, bleached), cream of tartar(for adding to the Baking Soda 1 to 2 to make baking powder as needed), green coffee whole beans(roast as needed).
A better option to bottled High Fructose Corn Syrup drinks would be powdered drinks made with sugar. There are ones that will store long term.
All of this should be stored in Mylar bags with O2 absorbers of correct size and sealed with a hot iron. For extra protection you can put the mylar bags inside of food grade 5 gallon buckets but that may not be necessary. Store this way, everything I mention should keep for at least 25 years when stored around 65F.
This will form the staple of your long term food storage and supplement all that you should have in your well stocked and rotated pantry. If you wish to further extend this you can add professionally packaged long term storage meals from companies like Augason Farms but samsclub has 30 day buckets shipped for a reasonable prices. (I don’t work for either of them) You can add the rice and beans to many of the meals to add additional calories/extend them.
Don’t wait start now, Mylar bags and O2 absorbers are not expensive and can be bought online from many sources. I find that eBay has a lot of sellers to choose from. Be sure that the O2 are big enough for your bag. I use 2000cc for my 5 gallon Mylar bags. Be sure that they are really 2000cc some sellers cheat – read their ratings and reviews.