The last one feels like the most technically proficient use of the lens, and is my favorite aesthetically as well. It isn't over the top tilt effect, it isn't gimmicky, and it's actually helping to draw attention where you want it, etc.
Don't forget to also try to use your tilt lens for it's opposite (and more traditional tilt photography) purpose: Bringing MORE stuff into focus than you normally could by lining up the plane of focus parallel with stuff not perpendicular. And my favorite tilt photos are when people throw a whole area INTO focus that wouldn't normally be, while ALSO leaving thematically less important areas in dramatically less focus than they would normally be. I.e. using both functions of tilt in harmony.