We don't eat many carbs these days, but when we do, I like Lundberg white basmati rice. I've been keeping a couple pounds of dried black beans around as well, as a pandemic contingency thing, and also some Rosarita canned refried beans, because refried beans are kind of a comfort food for DH and me. I also have some red lentils around for the occasional batch of dahl, and some green split peas for split pea soup.
Neverminding the cost and extra packaging, I don't normally enjoy the seasonings in those types of mixes. The basic ingredients are much more versatile, and cooking in an Instant Pot, there's really a negligible savings of time/labor.