I don't know if you're still looking here, but after trying out the alternatives, they all had things I didn't like. Source Code Pro was nearly perfect for me, if the latin characters were only as tall as the non-latin characters; the designer seems to like generous space between lines to the point of even skimping on accent length for upper-case characters. The good news is that it makes the Han characters much more legible, as they are larger than the latin ones, but I never use those in my programming.

Looking at alternative fonts, I noticed that the designer of the Meslo font considers Menlo (so also Bitstream/DejaVu) to be "too cramped," so my personal preference must be fore closer-together lines than average.

Here's some samples from a directory listing:

https://phab.jasom.org/orfiles/dejavu-sans-mono-latin.png

https://phab.jasom.org/orfiles/dejavu-sans-mono-non-latin.pn...

https://phab.jasom.org/orfiles/source-code-pro-latin.png

https://phab.jasom.org/orfiles/source-code-pro-non-latin.png