I like the last one best. He can use my belt if he needs too. I agree on the tilt and him being in the upper third being a bit odd.
Maybe a little wider shot, camera level with the tracks, down at a kneeling position to shoot with his feet closer to the bottom of the frame an a bit more negative space above him?
I say a bit wider of a shot so you have a little more option on cropping in PP if it's not exactly as you want it to be. I have a habit of shooting a bit wide now a days so I can crop if I don't exactly like the framing. Then again I shoot film not digital, so it costs me more to go re-shoot something aha
Other than the tilt and him being a little to high up in the frame it's an excellent shot though!
Edit: Also maybe try a few (be safe playing on tracks!) with you laying in a prone position between the rails shooting him standing, walking down the tracks both away from and toward you, crossing the tracks. I just like those low to the ground kind of candid but planned motion shots. Eh, I'm weird I know.