I can tolerate what you said up til the bit about Bon Jovi still having respectable albums.
They are the worst of the bunch by a fucking mile !
Def Leppard actually base their whole show now on High n Dry through Adrenalize + Retroactive so about half of it is pretty damn good
I haven't liked anything much they've done since Pyro , although their last album got good reviews from old fans. I didn't like it. I'm not down on Hysteria as much as many here ,but do prefer the earlier material.
Whitensnake.........yeah a bit of a parody of themselves now and their recent output is patchy. As far as songwriting goes the bluesy rock albums they did with Aldrich (like Forevermore) weren't great in my opinion but on a songwriting level I'd say they're better than anything Leppard or Bon Jovi have done in ages.
Bon Jovi are just a fucking joke on all levels . Now you've pissed me off thinking about how fucking shit Bon Jovi are