Impossible to find ROM for this not-that-far-away-from-now smartphone.
Are the /e/ versions of the three HTC devices available compatible for HTC One X ?
If not, is it planned to create a ROM for this device ?
I had a Cyanogen ROM on it five years ago, it perfect but now outdated.
ROM are never compatible between models even of the same brand.
No one suggested this device on this forum so the development is not planned.
If your device is compatible with Lineage (EDIT : not compatible) you can request it to be compatible with /e/, if not you can try the GSI if your device is Treble-Enabled :