The last one. I think this is the most clear in getting across all the themes of working constantly in repitition, over and over, and the way that can feel like such a burden. The self-defeating prophecy and all that.
I suppose it helps that the drawing is more detailed than the previous.
In the close up I was trying to make him look like he's exhausted, having his soul destroyed (without trying to sound too over the top). I hope this one has more of an emotional resonance, even if the face is still simplified