I've focused a lot of my watch enthusiasm on Zenith Chronographs, but there is still so much for me to learn about even this one brand of watches. I'd like to learn about the watches that Zenith made that have been important to them.

I'll hazard a few guesses, to start things off, and not in chronological order or in order of significance.

The first Zenith that caught my attention: A386. I don't have one, so I'll have to steal pictures from this forum. I'll use the one that was in the last FOUND thread:
So in this case, probably not the watch that is important so much as the movement, but that is a really great watch. I assume everybody reading this already knows the importance of this movement, but just in case, this was one of the first automatic chronograph movements that were all were delivered in 1969. And then the recovery of these movements is what brought Zenith back from the dead many years later.

135: again, I don't have one, but this seems a very significant movement. Ok, so maybe Zenith doesn't have important watches so much as they have important movements? Back to the 135. This watch won all the awards in 1950-1955 https://omegaforums.net/threads/who-was-ephrem-jobin.2807/. And according to some members here, is the most beatifulest movement ever. I could not find a great example on the forum that I could link to, but I found this cool article https://monochrome-watches.com/case-study-chronometer-zenith-calibre-135/ which has some great pictures.


I just learned about the 5011 movement that won a bunch more competitions: https://omegaforums.net/threads/cal-5011-k.4217, though it probably shouldn't be a wristwatch.

In 1909 a Frenchman named Blériot was the first to cross the English Channel in an airplane. He just happened to have a Zenith strapped to his wrist: https://monochrome-watches.com/history-of-the-pilot-watch-part-ii-zenith-montre-daeronef-type-20/. It's not clear to me exactly what that watch was, but the linked-to article has a nice picture:





I guess there is a case for the el primero based daytonas, but I don't want to include a picture if that here.

What else am I missing?

 

You're missing the 133.8 bumper movements. They were designed by the same man who designed the cal. 135, and are both functionally and aesthetically as fine or finer than any other bumper movement ever produced.

Any well-preserved model is well worth owning, though the Captain chronometres would top the list.