Stirk's only had 2 main appearances in the comics. That's less than Crazy Quilt or Polka Dot man. Yeah, he was in a famous issue, that gives him a little more cred, but not much.
As for Rhino, he's got to be up there with Spiderman's main rogues now, having a major appearance in a blockbuster movie. It's like how Bane was truly elevated into the mainstream with Batman and Robin.
I'd say Zsasz is b-list. He's popular enough to be in Batman Begins plus the Arkham games, Batman: Dark Tomorrow, Lego Batman and DC Universe online. Plus, he's had more appearances in the comics.