What are called “Great” Russians are but the country as a whole is an East Slavic ethnic group indigenous to Eastern Europe, with a common Russian ancestry/culture & history.
There are also: Tatars,Chechens,Bashkirs,Chuvashs,and Ukrainians to name the top 5 ethnic populations,aside from Russians- of the 26 separate oblasts and republics-most of which are definitely not white.