My Trader Joe's staples include:
brown rice pasta (spaghetti and fusilli)
toasted sesame oil
sunflower seeds
pepitas
sultanas
raisins (the plumpest I can find)
apricots (slab)
brown rice tortillas (only if cold/frozen)
chocolate ice cream from the rainbow brand
marinated mushrooms
roasted peppers (jar)
canned artichoke hearts
some rice noodle bowls
rice mac & cheese
tuna
corn salsa
salsa verde
dried mushrooms
concentrated stock/broth packets
freeze-dried fruit
those new apple clusters. DS calls them boulders.
pickles (dill spears and bread/butter, though I like Ikea's swedish pickles better if I'm eating sweet)
cans of diced green chiles
Former staples included a variety of roasted tomato/eggplant spreads, mango-pepper vinegar, freeze-dried mango, mango passion exotique frozen dessert thingy, lime chili cashews . . . but allergies have robbed me of my favorites.
When I lived near one (15-20 minutes instead of an hour), I also bought my frozen veggies there. Asparagus, peas, artichoke hearts, mushrooms, peppers, green beans, etc. And I was vegetarian there, but I sometimes bought frozen meat (fish, chicken) for the manbeast.
Sometimes I pick up yogurt, chocolate milk, 4-way hummus, greek salad, and bagged greens. Sometimes canned beans and canned corn. I like the cuban-style black beans. Manchego and baby spinach make a nice salad. Oh, they sell pine nuts for a decent price.
The cheap olive oil has gone downhill lately.
Sweet red wine is a frequent impulse buy if they have any that day. Or if they're sampling.

If I'm stopping for lunch, I buy a package of smoked turkey, a container of the cheese that's kinda like that garlicky cream cheese stuff, and a greek salad. That takes care of two-three of us.
Lately, I buy a sea salt grinder. When it's empty, I fill it with something I mill on a regular basis. Currently I have one with Just Roasted Garlic and one with white peppercorns. I still have the lemon pepper grinder I bought. The grinders aren't adjustable and don't work for fine objects, like cumin or fennel seed. They're fine for larger spices and peppercorns. Of course, I'm probably adding minute bits of plastic to everything I eat. Oh, well.
A lot of what we buy are probably convenience foods (boxed mac and cheese). The brown rice pasta and dried fruit/seeds are part of our daily diet. I eat a lot of the marinated mushrooms.
They have dehydrated chicken strips--dogs love 'em. They occasionally have pizzles, too. Super stinky dog love.