Also the Organians, the Q, the beings who made Kirk fight the Gorn, the beings who raised Charlie X. Plus any others who have cropped up in TOS, TNG, etc.
All those species in the same room trying to communicate with each other. Sounds like a convention for extra-dimensional, non-corporeal beings. LOL.
Yes, you're right. There are many others like the one that feeds off people's artistic genius that meets jake in "The Muse" that can turn into a ball of light and just fly through space and the creatures that put their children in black holes of Timescape and there's also trelane. The room gets bigger and bigger.