This is not only entirely feasible but probably even easy for you to accomplish as a single rider for most of the things you mentioned. Where this gets spotty and unpredictable is WEATHER in the Summer. Things like those 3 outdoor coasters at IoA pose risk of being missed if the weather is bad and no one will be able to help you there. You might find yourself hunkering down on an indoor attraction while you wait for things to blow over. Might delay you some.
I'd say rope-drop IoA and do Hagrids > Forbidden > Velocicoaster in whatever order is easiest for you. Hagrids and Velocicoaster are relatively close to one another so the wait times could be easier for one as opposed to the other and that might effect your order while there but Forbidden is back corner so do it between OR after those two, if anything. Then do Kong then Hulk on the way out as I don't imagine you'll want to wait at Hogwarts Express for the ride over and can save time walking to the other park. Do Mummy upon entrance, Transformers on the way to Gringotts.
Honestly, shouldn't be hard. Best of luck to ya!