That was he who noticed that I felt no pain.

That was him who noticed that I felt no pain.

which is correct? and why?

Question

That was he who noticed that I felt no pain.

That was him who noticed that I felt no pain.

which is correct? and why?￼

Answer

That's a tricky question.   If you break thinks into smaller units you would get  THAT WAS HIM, but then you would get  HE NOTICED.    I'm actually not sure of the right answer.   In situations like this it's probably better to rephrase.   ex:   He was the one who noticed  . . . etc.

Also, "That was" would not be a very common way of saying this.