Many Jedi have helped others in need. It can be as simple as encouraging words, or go so far sacrificial acts.
Umm, I didn't see a whole lot of Jedi like that in the Movies or EU either. Maybe that's the theoretical answer, but not the reality of how most Jedi actually were. Maybe Qui-gon.
These acts aren't well known, but they do occur. They are quite commonplace (in times of peace when the Jedi aren't acting as defenders), actually.