Yes there is one who went to Nepal and was professor @ TU. He died. There are few people who graduated from harvard and went back to nepal and working there. They are in their 60s i guess. Mero baau aama ko age ko.
You don't have to do big things to publisize yourself in media. They are doing great things for Nepal from their side as much as they can. Going back to your country and work there itself is a big challenge. It is a mental satisfaction to work for your country. not for name, fame and money.