At first glance, I think I might like 1 the best. 3, the blue, looks great, but I've seen more blue and green tabbards on Uther than any other colors. I don't like 2, but that's mostly because white is sooooo hard to keep clean when your adventuring in a dungeon or doing a lot of skinning... haha!
But, seriously, while I like 1, my vote is going to go with 4. The red and gold is very royal looking.
Stormy