Hardy's were never in WCW, they only won those titles during the Invasion angle. And WWECW doesn't count, think OP meant the real ECW.Matt Hardy, I believe.
He won the Tag Team Championships in WCW with Jeff, worked in TNA a few years (not sure if he won any gold, I stopped following his career after he left the WWE), won the ECW Championship and worked in the WWE winning the U.S. Championship, Hardcore & Tag Titles.
Looking through the posts, didn't see Christian York's name. He had signed with WCW, WWE, ECW and appeared in TNA.