My first hybrid ebike, which I use for both road and trail, had 700x35 Kenda Kourier tyres, and I swore by them. Fast rolling centre tread, with nobbly bits to the side to add traction when on trails. Perfect. Until they started to wear out.
As the tread flattened with mileage, punctures became more frequent. Okay, a puncture is easily fixable by the roadside, but it really kills the pleasure of a leisurely cycle. The majority here swear my Marathon Plus as vfr400 attests. I was cynical I'd admit, but they're not expensive (I paid £23 each for 4). They are very hard wearing, although not the very best on trails due to the road-oriented tread pattern. But perfectly fine for both road and trail once you get the measure of them. And no punctures.
PS: There is a Marathon Plus "Tour" version too which is a little more knobbly for loose gravel and trails, but I couldn't find them for a reasonable price at the time.