My two favorites were definitely Garfield and Teenage Mutant Ninja Turtles, which were my favorite cartoon shows until The Simpsons came out.
On your list, I also liked Captain N (was also a watcher of the Super Mario Bros Super Show and the Zelda cartoons). I also did watch Muppet Babies when I was a kid.
Other favorites of mine:
Smurfs. That one ran for a LOOOONG time.
Alvin and the Chipmunks: one of my big exposures to pop music back in the 1980s.
Galaxy High: A joint Japanese-American production about a couple of Earth kids (a popular football jock and a nerdy girl) sent to an intergalactic high school, where their roles in the social hierarchy are reversed. The series was produced by Chris Columbus, the music for it was done by Don Felder of the Eagles.
ABC also had the "Bugs Bunny and Tweety Show" which aired both old and new Looney Tunes shorts, though they tended to stick with more recent (for the time) shorts. I'm a big Looney Tunes fan, so I dug that.
One other aspect of Saturday morning cartoons in the late 1990s I enjoyed were the "Fido Dido" bumpers that announced commercial breaks on CBS cartoons like Garfield, Muppet Babies, and TMNT. The characters were originally created for a marketing campaign for 7-Up and are still used to advertise 7-Up in Brazil and India. They were pretty creative.
Finally, one of my favorite episodes of Futurama is "Futurama Saturday Morning Fun Pit" which spoofs 1980s cartoons and their consumerism. It even includes a humorous bumper sequence.
