None of those.
Edit: YES! Neltharaku was the correct answer.
You see my name, it's kind of familiar - Neltharaku is similar to Neltharion
You could even say it's an homage - Because Nether Dragons were created from Black Dragonflight eggs
My home is so damaged and unsightly - Shadowmoon Valley
But that's the reason I'm alive - The destruction of Draenor infused Black Dragonflight eggs with nether energy
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From the moment we met, I'm sure you saw right through me - Neltharaku is translucent
I needed your help to save my family - He asked you to rescue Karynaku, his mate
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To save us all, a hero travelled to an island that was not an island - Netherwing Ledge
There, he discovered a plot most sinister... - Sinestra visits the Dragonmaw on Netherwing Ledge