Welcome Joe, this is a really great site with lots of orchid resource. Glad you joined us.
With respect to your orchids: the first and third one would be in the 'Oncidium Alliance', meaning they could be hybrids or species of any orchids from the genus oncidium, odontoglossum, brassia, miltonia etc. We can only tell exactly which one they are when they bloom, and in your case it's going to be very soon Middle one as you thought is a 'hard cane' dendrobium.
Wish you success with your growing.