I'm not a fan of the Schwalbe tires. They're not as bullet-proof as some would have you believe, and they roll like they're made of solid rubber, which is kind of what they are. I tour a fair amount on a tandem with 26" wheels. I've done a lot of miles on the Compass Slumgullion Pass tires, 26X1.75. These are somewhat heavy with lots of rubber but with far more supple side walls than any Marathons. They have amazingly low rolling resistance, which was the plan behind their design.
https://www.compasscycle.com/shop/co...mgullion-pass/
If you can fit it, Compass recently came out with a wider, lighter tire, the Rat Trap Pass. It's listed at 26X2.3, but it measures only 52mm wide on my wheels. We haven't had a chance to take these on a tour yet as my spouse has been ill, but the few rides we have had on them have shown them to be fantastic. There's no terrain they aren't able to conquer (we ride a lot of gravel), they are relatively light for such a wide foot print and the lower pressure and very supple nature of these tires means that they will not be likely to puncture.
https://www.compasscycle.com/shop/co...rat-trap-pass/
Come out of the bone shaker era that the Marathons represent and enjoy the smooth ride of a supple tire. Even the sound is great; the Rat Traps are almost silent on chip-seal, as opposed to the horrid vibrating sound of the Marathons.