There are two historical characters who deserve to be called Eric the Great.
The first was Erik Thorvaldsson aka Eric the Red -- Viking, explorer, adventurer, warrior. It was he who led the discovery and settlement of Greenland, thereby introducing deception into selling real estate. (There was little green in Greenland but he didn't tell the settlers that.)
The second Eric the Great was an ask.com moderator who has now moved into the customer service division and guides Askers into green fields of knowledge. By his own admission he is also a pain in the Ask.