Thank you so much for posting these pics, matrix69! Incredibly helpful reference material here. Outstanding!!
If I could only choose one helmet, I'd take the new HT one since it has the most going for it. But, I think what the Medicom sculptor(s) understood better than the others is the arch of the visor. It affects the entire front half of the helmet, and how it looks from most angles. The shots you took from a bit overhead are the most helpful ones I've seen yet that best illustrate my point.
The visor "eye" part has a curve that extends too far and makes it too rounded on every helmet except the Medicom. That makes the whole helmet shape look wrong, especially from the profile angle. I took a couple of the HT helmet shots from your photo and put them next to similar shots from movie Fett pics. If you pay attention to the arch of the visor in the top (overhead) comparison, you'll see why the whole front half of the helmet looks off in the bottom (profile) comparison. It affects the shape by extending the front half too far forward. That changes the "cheeks" too.
View attachment 422126
And, yeah, that range finder is still too damn long.
Thanks again, matrix!!