Oh for sure, Jeff Bennett is a contender. He's in just about everything now and does an incredible array of different voices.
Gonzo kind of has a point though. Frank still does plenty but he's not nearly as active today as he was 5 to 10 years ago. So he was the Mel Blanc of cartoons in the post-Mel years up until recently but now some other actors are gaining on him. None of them would ever say they're the Blanc or Welker of today though, they're all far too humble for that.
I second MacFarlane
if you watch a stewie and Brian episode their personellys just bounce off eachother even though Macfarlane does the vioce of both of them