Dr. Christmas

From Homestar Runner Wiki

Dr. Christmas (aka "Cornbread") was one of the central characters in the story of Decemberween's origin. He was a companion of Archibald but their friendship was inconsistent, as evidenced by their fight to the death on Mount Rushmore (which was never seen). He is very similar to Santa Claus and presumably is affiliated with Christmas in some way, which is kind of weird because no one in Free Country seems to celebrate Christmas.