Schwalbe Marathon Plus tires are not flat-proof but they sure are close to it. I wholeheartedly agree with trying different stuff out and thinking out the box, but at the end of the day when you just want to minimize flats as close to zero as humanly possible then the Marathon Plus tires are really the way to go. Full disclosure: have not tried tubeless, not the lightest nor fastest tire out there, but, man, do they last.
signed
a satisfied customer