If you're looking for a utility function that reproduces human behavior in all contexts, I'd say the empirical evidence is overwhelming that humans don't have utility functions, bounded or otherwise.
A utility function can reproduce any combination of behavior.
Sure, so everyone's utility function puts a value 1 (ETA: or a value x > 0 that varies unboundedly as a function of some feature of the universe) on all possible universe-histories where they take the actions they actually take, and 0 on all other possible universe-histories. I don't think that's an answer.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.