Yes, they did make more Transformers series after that, hence why the original series was dubbed G1, to indicate it was the first.
But since the only other Transformers series I've seen is the japan only subset, I can't say what the other series were like.
Those were stories created by the Japan animation division of Transformers solely for their own country, as opposed to the one we saw, which was intended for international audiences.
if you're not a fan of Japanese Anime
DO NOT watch the subset Transformers episodes!
I won't break it down completely, but suffice it to say, they're not as good as the international one.
For the sake of accuracy, I suppose I should count Bionic Six as well, but I didn't see that until the mid-late 90s.
It's dated from 1987 though, so it still counts.
The ones I saw most were:
http://en.wikipedia.org/wiki/TigerSharksBattle of the Planets
The Wizard of Oz animated series.
I particularly remember Dorothy having a great deal of difficulty keeping Ozma (the young princess who ruled Oz) out of trouble. Suffice it to say she'd do lots of crazy things with her magical power without thinking about whether or not it was safe to do so. For example, bringing a large origami bird to life just because she wanted to go flying.
And when I say large, I mean it, she made it out of a piece of paper that covered the entire courtyard.
It took both her and Dorothy to fold it over.
http://en.wikipedia.org/wiki/Belle_and_Sebastian_(Japanese_TV_series)I vaguely remember Thundercats and Robotech.
But I'm not actively seeking those shows on DVD.
I'm having enough trouble finding Sun Beneath the Sea and Robostory.
I acquired the Cities of Gold DVD set a couple of years back, but so far, it's the only one (aside from Transformers) that has been transferred to a DVD format.
Maybe if the those two and Bionic Six got transferred to DVD, I'd start searching for the others.