If you’re thinking about specific taxa, I would add ichneumonid wasps to the list of particularly useful taxa to collect. The diversity is mindboggling and there are a ton of undescribed species in North America. I specifically study the subfamily Ichneumoninae. Most species of ichneumonines have been described from your area, but I don’t doubt some unknown species remain though. I know for a fact there are some undescribed Phaeogenini in your area, at least. Even if you are collecting known species, it is always a great help to systematists to have more specimens and distribution records. Plus, iNat is seriously lacking observations of most species and a decent number of genera. Here are some examples in my collection: https://www.inaturalist.org/observations?place_id=any&user_id=bclaridge&verifiable=any