Unheardof Greats

i think it would be nice to start a thread dedicated to players who could have been greats, or are greats just not well known. the reason i thought about this is because i just finished watching a show about the effect of communism on football on BBC4, and i was shocked to hear about Eduard Streltsov a player only well known in russia, he is considered to be as great if not greater than Lev Yashin had he not gone through the career he had. find out more about him, i found it very interesting.