Chay, welcome! Your husband sounds like a sweetie, you can't imagine how lucky you are to have that kind of support at home. I have to say I'm really excited to see you come through here, just starting out, looking to arm yourself with knowledge. Way to plan on being prepared!!!
My WW non-perishable staples repeat a lot of what's been said:
Fiber One cereal
Cartons of soy or almond milk in the cupboard
Mustard
Lemon juice, lime juice
Low-fat dressing/marinade for meat
Dried herbs
Olive oil
Different vinagers to make dressings: balsamic and red wine in particular
Ryvita rye flatbread crackers
Goldfish crackers when I'm in the mood
Thomas's Light Whole Grain english muffins (1 point each)
Flat-Out or other low-carb wrap
Nuts - almonds, pistachios, and walnuts in particular
Oatmeal (non-instant)
Grains like bulgar wheat, barley, and quinoa (so you don't get bored of rice)
Perishable items I always have on hand:
Fruit & Veggies (obvious, that one!) - Avocado, spinach, tomato, different kinds of onion, bell pepper, zucchini, squashes, apple, pears, strawberries, blueberries, eggplant, sweet potato - whatever's in season, mostly.
Plain low-fat yogurt
LF string cheese
Light Laughing Cow wedges
Stuff in the freezer:
Frozen back-up veggies for soups or times when I don't have fresh
No Sugar Added fruit popcicles (1 point for 2!)
Meat I've bought while on sale, packaged into serving sizes, and frozen
Low-fat Eggo waffles for a quick breakfast
frozen fruits for making syrup-type sauces and smoothies and raita
a couple of Smart Ones or Lean Cuisines for busy nights/lunches
Many, many tupperwares of homemade soup I've frozen into single-serve portions so I can take them for lunch
Etc etc...
The list goes on. Good luck, tell us how your cupboards look now after grocery shopping!