That list came from Wiki. Here are the next categories. (I only searched because I was looking for Catholics, because I remember it being specifically mentioned when we were learning about the Holocaust in Catholic school.)That list is missing some categories too.
"Taking into account all of the victims of persecution, the Nazis systematically murdered an estimated six million Jews and an additional 11 million people during the war. Donald Niewyk suggests that the broadest definition, including Soviet civilian deaths, would produce a death toll of 17 million."
(so more non-Jews than Jews.)