I grow a couple of bog orchids: Pogonia ophioglossoides is a weed that forms long runners and will fill up your pots or bog garden. Calopogon tuberosus is another easy species that I usually grow from seed, but it slowly forms nice clumps that can be divided during hibernation. Both are native to Central/Eastern Canada, grow well with Sarracenia and are hardy species.
Spiranthes should be another easy one. I have/tried a few other orchids (Platanthera, Cypripedium), but they are a lot more picky, need special care, are slow to multiply, and are pricey. So I wouldn't recommend unless you know what you are doing.