List of armor with pictures?
There is the wardrobe preview in game, would that help? You can preview everything on your current character even if you don’t have a piece unlocked.
And the wiki has full gallery pages for whatever gender/race combination you have. Example https://wiki.guildwars2.com/wiki/Asura_female_light_armor
I like using the wiki gallery for a quick reference, if I’m looking for something specific I can scan through the images and pick out ones that look promising. Then I use the wardrobe function in game (if you go to the bank it shows you all the skins, even ones you haven’t unlocked yet) to see how they look in-game – how they move, any effects, how reflective the material is etc. and how the pieces I’m planning work together.
Then I inevitably find one of the skins I’ve chosen is really expensive or hard to find or otherwise a pain to get, try to find an alternative and decide it really does have to be that one and spend the next week/month working on it.
“Life’s a journey, not a destination.”
I don’t know if this is still maintained or has the newest stuff in it but I used to use this as my go-to before the Wardrobe came in:
http://argos-soft.net/GW2/ArmorGallery/
You can pick race and gender and color tone. I think it also gives vendor locations for acquisition.
http://www.gw2armorgallery.com/index.html
You could try this one in conjunction with the argos-soft one and the wiki. Problem is it’s difficult to gain access to all the armors and do the work to snapshot each one. You can always go to the bank and check out the wardrobe there.
RIP City of Heroes