hmm, I think maybe it works as like a perfect apex graph for me, with Kid A and Amnesiac being the high points, and the albums on either side decreasing equally - HTTT + OK at second, Rainbows+Bends third, etc. I'd really be surprised if they ever got back to that point again, King of Limbs just did nothing for me, on 4 or 5 separate attempts it leaked right through my ears and left no impression.
I really like that Tim Burton comparison though, says how I feel about Thom's recent work much better than I ever could have dreamt up.
Meanwhile, it might be different, but Jonny is doing some really crazy work with his film scores. I can still remember watching this in the theatre and feeling like someone had finally seen the light about the epicness of 80s slasher horror soundtracks:
http://www.youtube.com/watch?v=7HjWIr80ln4