Okay Anselm,
Arthas is mostly DLC armor set (Black Knight from Limited edition) and part of Paladin armor, the latter being high level stuff i think...
Then i added horns and flame ornaments on top of the helmet to make it look like the Lich King, but the preset horns on the helmet are a bit too high, that i cannot change ;o)
Regarding Link, here is a few tips :
-Hat is Knitted cap + modified racoon tail
-Wide opening gloves
-Shade of green is 7:19,25
For you, one bonus pic, a joke character called Obelix (famous european comics) :