Who are you and from have you have you come. The great Sage Ramana Maharishi sitting at one spot in Arunachala for years answered this. " Who are you? Inquire about the self. This attracted Somerset Maugham , Arthur Osborne , and many from the West to visit Arunachala.
About NRI , they are best where they are. Instead of writing about Bhajiya thale formulations of a homosapien's primordial soup mix, they should do something constructive for India. Do charity , help institutes. There are many NGO bodies doing good work. Help them.
This, who is the numero uno Indian overseas, is question asked by persons who have had no time to self introspect.