I've wanted a cute shiny yellow outfit for my minstrel, Brewbelly, for a long time. After trying many chest & legs pieces I realized that beauty lies in simplicity, when I tried out the basic shirt & pants outfit from Bree vendor. It's very easily acquirable, shines beautifully in yellow and in combination with elven cloak even makes an elegant garb.
Chest: Fine Shirt and Pants, yellow dye (Outfitter vendor in Bree)
Back: Cloak of the Galadhrim, sea blue dye (Quest: Vol. II, Book 7, Chapter 9: The Worries of Lord Celeborn)