There are a few more dragons I haven't shared yet, but unfortunately, they are not on your list. I had to hold back because each dragon took 3-4 pages and I didn't want MME3 to be overloaded with too much of them. Plus, there's a rumor of a new draconomicon-style book that might come out later this year. However, if that isn't the case, I can still add some of them in MME4.
Again, though, I am pretty sure you should have plenty of new dragons to play around with until then.
The remaining ones yet to be shared are quite deadly.