Just pay the man for PragmataPro[1] and turn off anti-aliasing in Emacs and iTerm. The font is legible and beautiful at every size on any screen.
Having tried, and evaluated, basically every mono font in existence worth using here, I may end up just buying Pragmata Pro.
My current daily driver is Input, and not set as a compressed or condensed style. Input is only hinted for the weights Light, Regular, Medium, and Bold, for normal width; the other three more narrow widths are not hinted at any weight. At the sizes I prefer text, Input requires the hinting supplied by the author.