It's interesting to collect names of oolong varieties. But one obstacle is, in tea, there isn't clear definition of varietals. Sometimes it's hard to tell which and which belong to the same varietal. For example, in your list, Ali Shan and dong ding are usually of the same variety if they are both made of green heart oolong cultivar. On the other hand, should southern Fujian shuixian, northern Fujian shuixian and feng huang dan cong all count shui xian variety? Should various types of feng huang dan cong count as various varieties? People don't give consistent answers on these.
There is a guy named Luo Shengcai who wrote a Wuyi Yan Cha book which includes photos and cultivation experience (not really very useful to tea drinkers) 70+ Wuyi "varieties", which are some of his favorite among 1000+ Wuyi "varietals" that he had cultivated. Each of his "variety" has unique characteristics. But since there isn't a clear definition about tea varietal, I'm not sure if all these could be called individual varieties (which seems a word rooting from vine cultivation?). In botany, variety is often used to mean subspecies of plants. In this sense, extremely few of the tea cultivars qualify for being varieties.
Sorry for making it messy. But I guess that's how tea is
Based on the context, it seems that the varieties op is collecting are diverse types based on cultivar+geography+processing. That is indeed fun.
One thing I want to add is, two samples of the same tea might be more different than two samples of two different teas.