Demetrio, heartbreaking? Not quite sure what you mean. Are you listing songs where the guitarist's playing on these particular songs is just oozing with emotion? That's what I'm assuming you mean.
At any rate you have mentioned three of my favorite guitarists in that regard - Gilmour, Latimer, and Bairnson. All three, at least to me, can evoke so much emotion...and by playing so few notes.
In fact Ian Bairnson once said something to the effect of,
it's not so much the notes you play as much as it is the ones you don't. - makes a lot of sense to me.
So, in addition to your fine list I would add:
Andrew Latimer - A Boy's Life; For Today; Drafted
David Gilmour - pretty much everything, but especially to me- Castellorizon
Ian Bairnson - Dreamscape
Carlos Santana - Europa and Samba Pa Ti
Chris Isaak - Wicked Game