Hi Pete,
I do have a calibrated screen, (only for the last 6 months 
) and your photos look fine to me. Sure, some on the darker side, but they look to me as if that’s how they should look… if that makes sense! I don’t have any real knowledge of printing, but when I print my own photos on a basic Canon printer, I have settled on a couple of tweaks in the printer setup, otherwise they come out too dark. I don’t know if this is because I don’t have a proper printer profile or just because of the different (reflective not transmissive?) medium.
Probably not much help, but I wanted to add my 2c worth…