I actually found out about him only a few days ago. Immediately caught my attention, not only for the emphasis on classic liturgy and rubrics, but also because my wife has Catholic connections in Mumbai and Goa, not so far away culturally or geographically (or so it seems that way from North America).
From your posting record you should be reading Fr. Zuhlsdorf’s What Does The Prayer Really Say
regularly. That’s where I learned to know of Ranjith, a number of years ago. He was thought to be in line to head up the Congregation for Divine Worship but then Benedict named him Archbishop of Colombo. At that point Zuhlsdorf did a lot of “reporting” on Ranjith without ever fingering him as papabile. I remember being a tad frustrated at having to read between Zuhlsdorf’s lines and guess at what he “really meant.”
I assume Zuhlsdorf knows of him either from his own years in Rome or through mutual friends in Rome.