There are a lot of times I've had entities with hauling capacity greater than stack size. Too bad that (vanilla) hauling limits to the lesser of one stack at a time or carrying capacity.
In the past I've tried several inventory/hauling mods, but I couldn't find any that performed without bugs. Lately I've just been using a stack size increasing mod. Sorta cheaty, in that I no longer need massive stockpiles, and I can also finally take advantage of carrying capacities. Still doesn't allow for hauling more than one kind of item at a time though. Battlefield cleanup is still a chore.
That is why i get cremation as fast as possible and burn the corpse, and make sure my crematorium is set in the middle of a stockple, instead of doin 12-15 trip, as soon the fight is over, each one bring a corpse back to base then only weapons remain. if you are raid heavy, making a couple rematorium in a couple max sized room with stockpile mean very little hauling after a fight, and as the stockpile fills up you can always stop using the crematorium on a stockpile and switch the other on.
Last modpack i played was hardcore-SK like but with only one modification, i made mending not use any material, and take a decent chunk of time to repair pretty much anything, but it meant i had a steady supply of all sort of items, from firearms to armor/clothing, and with infusion mod installed that make it quite interesting. Once had a colonist moving 28cell a second...... hyperactive squirrel on speed during a high of crack, just a little faster he would go back in time.... Needless to say he was my long range hauler hehehe.