Fallynn of the San’layn megathread has list of all the race request megathreads if you’d like to see what all is out there:
Some that need to be added to your list include the Saberon and Arakkoa megathreads, both created by Lore-Herod.
Saberon:
Arakkoa:
As well as the Jinyu/Ankoan megathread, created by Rorrand-Wyrmrest-Accord:
Keldar-Sargeras also has a Wildhammer/Dragonmaw megathread:
I think that is all, but please be sure to check out the list Fallynn made too to make sure!
That said, thank you for linking to my megathreads! 
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