And by all accounts the Lana Lang on Smallville was never exactly well received, so not what I'd call a prime example.
As for the others, Dent's physical characteristics were never really significant in distinguishing him, rather it was his horrific scarring. As for the Osbornes...well that is a weird hairstyle and it'd be a bit hard to translate into live action so that was a fair choice.
The thing with the Judges, unlike the superhero/villain types that usually populate comic books is that they all wear the same outfit and when they have their helmets on can be a bit hard to distinguish beyond skin colour and gender (probably why they have name tags!) In the case of Anderson I imagine the long blonde hair was at least in part a way of making her stand out batter and perhaps distinguishing her from Hershey too (or visa-versa, I forget which character came first.) Not that I'm saying her being blonde is "vial" to the character, but it would be odd if she wasn't and it's a pretty easy thing to do so I can't see why they wouldn't.