I have always believed that High Elves can be more than just Re-skins of conventional Blood Elves, therefore and seeing that not even the devs can think of anything beyond hair colors, I have taken matters into my own hands and create something new, at the moment it is a work in progress, but here are some previews of what I have achieved.
Keep in mind that any tattoo patterns or facial or body markings may change over time.
I noticed that it doesn't look good in the screenshot so here is what I tried to do in one of the images.
Progress:
Male High Elves: Complete
Female High Elves: Work in Progress