By Lingon
I looked at one of Natural Earth's raster maps and drew the ranges that appeared tallest, but I could absolutely have made some mistakes there. Which ones would you remove or add?
For example, I would add the Tien Chan range between the Altai and the Kunlun mountains (summits over 7000 meters here). In comparison, you've shown the north mountains of central siberia where the top summit is 1701 meters high. Occidental Ghats in India are more high than the australian western range.
In fact, it depends of what you wanted to show, I suppose (the highest mountains, the more "barrier" mountains, the biggest in areas...).

Anyway, I like the map and really get what you mean for the dark Hejaz (I'm far from your talent at drawing and quite never miss to blur or spill ink by inadvertance...).