Pump shotgun with different types of shot.
Rem, Moss, Benelli, any would work.
Shotguns are versatile, you can use them form hunting for food to self protection. Pumps are less likely to mess up than an auto, so that is the dependability factor.
but, if you need a rifle, I would say getting an over and under Remington with a 12ga and a .223 rifle combo. But, follow up shots will be much harder.
It just depends, hunting and survival or self defense?
(My gut still tells me Remington 870)