Sylvari Heavy
check the pvp locker in the Heart of the Mist (pvp hub) :-)
Male: http://wiki.guildwars2.com/wiki/Sylvari_male_heavy_armor
Female: http://wiki.guildwars2.com/wiki/Sylvari_female_heavy_armor
Cultural armor is probably your best bet, since it’s supposed to look like it’s made of plant material. If you hide the helm and shoulder pads it will look less like armor as well.
“Life’s a journey, not a destination.”
My female sylvari uses the Phalanx skin, minus the helm and shoulders. Otherwise, I would use one of the cultural sets. The front of the Phalanx top kind of looks like a leaf, and the pants are actually a skirt. To me, it is the least heavy looking heavy armor.
Go look at Tier 2. On male sylvari it’s a robe. Only problem is the whole middle area is an undyeable blotch based on your skin tone; my lemon-skinned vari gets a dull brown there that won’t blend with any vibrant colors.