Don't forget Kane. He never protected himself from chairshots. He's still pretty sharp mentally so

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Kane should be alright. He has a huge frame, big solid head and skull, and wore a mask through a lot of his earlier career. While not the best padding, it still looked decent.
Daniel Bryan's whole makeup is the opposite, and he's likely had more shock than anyone. All of his moves had massive impact to his small frame, which likely had the effect of shaking a toddler after a while. Lucha's don't seem to put all of their impact into moves, and it was more agility and taking bumps the right way. Bryan was a showman.