I was born in 1975, so I was squarely the Saturday morning/after school cartoon demographic. He-man, of course, was a heavy favorite but there are actually a couple a like more:
Mysterious Cities of Gold was pretty different compared to a lot of its contemporaries (due to it's anime connection and being more of a serial). That show absolutely holds up...its amazing to me that show finally got some sequel/continuation seasons and its a shame that (to my knowledge) they haven't aired in the US. It was a bit weird, for obvious reasons, the kid voices for the new show are going to be different, but its still something I've been having to get used to.
I know nowadays people (somewhat deservedly so) crap on Harmony Gold and how they handle the Macross aspect of Robotech, but back in the day for most kids who watched it, Robotech was awesome. Looking back on it, it was a fascinating experiment to tie together 3 different shows in that way to try to make one overarching narrative...a large part of it hinging on a different interpretation of the word "culture" compared to the source material.
Finally, my personal favorite from the era, "The Adventures of the Galaxy Rangers." (my avatar is one of the show's rogues gallery, "The Scarecrow"...a bio weapon from war fought eons ago between two ancient galactic superpowers that has been reawakened.)
Ostensibly a space western, Galaxy Rangers was made interesting by a couple of innovations. It was one of the first syndicated animated cartoons to use CG animation (in a very limited way, mostly used when interacting with computers). It was an early example of a show that was animated in Japan to take advantage of those animation sensibilities (rather than for cost which is what Disney was doing, not that Disney of the era minded the quality they could get out of Asian studios). Unlike Voltron, Sabre Rider, or Robotech though; this was original animation done based on the American scripts. The animation was handled by well known studio TMS Entertainment.
Other things of note: The main four cast were not in every episode. Some episodes would have all four, but others would often pair up two of the rangers together (with maybe some of the more important secondary characters), or even have them mostly go solo. A couple episodes even dealt with none of the main cast and only used secondary characters. Also, while the mains avoided this fate, there were a number of obvious deaths of side characters in the show (two techs getting blown out of an airlock into space with no suits on, for example). Finally, its a shame...the show was intended to have a toy line, but production wasn't lined up in time, so while the show did get a complete 65-episode run, it wasn't renewed because no toys for the NA market. Europe did get the toys though, and the show actually did pretty well (I'm told Germany really loved the show.)
Like many 65 episode shows in the 80s, quality varied wildly, but the best episodes absolutely hold up. The show was produced in 10 months (which is an insane schedule). To manage this 3 animation teams were used. The scripts were divided up, the best scripts went to the A-team (the best animation team), the OK scripts went to the B-team, and worst scripts went the C-team (a cheap Korean subsidy). So, if the animation looks kind of choppy, you can expect the script to be kind of bad as well...it's an easy way to get around some of the lame episodes (stay away from Mothmoose, for example. Its a pretty bad episode, and doesn't really add anything to continuity).