I think my favorite one is where at the end of a JLA story the team gives the Red Tornado a new costume. I think it's the above listed,Justice League, "The Man Who Murdered Santa Claus" by Wein, Dillin and Giordano (from JLA 110, 1973)

BTW anyone remember a Ziggy Christmas special a long ways back? I never cared for the strip but remember liking the character in the special.

Fair play!