I like the first one best, but if you want to add more depth, you could try moving the torso up and down slightly to simulate the chest heaving while breathing. When I do this, I move the legs so that they are still during the animation of the torso.
All of the animations are really good! The first animation looks defensive which makes it a good idle animation as a sword fighter wants to defend his body. The second animation the arms move up and down too fast and doesn’t look like the way a sword fighter would look. The third animation looks like the way a sword fighter would be running with a sword into combat before going into the defense animation.