^Actually Strong has done three
versions of Barbara Gordon, since she's also Batgirl in the Super Best Friends Forever
It's not too surprising that the Groening shows haven't used a lot of the big voiceover names today, since they tend to stick with their established ensembles except when they bring in celebrity guests. I mean, as far as I know, neither show has used Grey DeLisle, Jennifer Hale, Yuri Lowenthal, Steve Blum, Kari Wahlgren, Greg Cipes, or the like, and Futurama
has never used Kevin Michael Richardson, although he has done The Simpsons
11 times in the past 4 years.
Sometimes there are shows or studios that don't use the voice actors ubiquitous everywhere else. For instance, Frank Welker did virtually everything
in the '70s and '80s, but he never worked on Filmation shows except for a few years c. 1980.