Tire choice is so dependent or terrain, environment, and riding style and it is difficult to pick one type/brand over another. Either way, no one plans on having a flat; we can only prepare for the worst and hope for the best. One of my biggest surprises when starting to ebike commute is the amount of debris (trash, glass, car parts, etc..), uneven surfaces, and "bend your rim" pot holes that are amplified at +20 mph I didn't really notice at a slower speed on my pedal bike. I had to get a brighter light to see earlier and have time to avoid these pit-falls sooner at 5:30am. It looks like I'm riding drunk sometimes because I have avoid stuff like that on the road.
I just use Kenda 26X3.5-4.0" inner tubs (Amazon, $20) along with Stans and Mr. Tuffy. My thinking is the tube will provide an extra layer of protection, easy repair with kit if I get a server flat, and easy to replace with another tube with a few tools if I can't repair the puncher.
I would just use the Kenda tires on the Radrover to get a feel for how they support your riding style and environment. Then you will have a starting point to pick something else down the road. It won't take long because my rear tires were down to about 30%-40% tread after about 750 miles of 60-70% paved road/trail riding (front Kenda were about 50-60% tread).