Totally interested! I live for dark, gritty fantasy settings. 

Regarding setup, I personally would enjoy playing one character, with all of ours working either under a single house or under two conflicting ones (I'm using the term conflict very loosely- I'm all for an all out war between houses, but I feel like maybe some sort of espionage between two allied houses would be pretty interesting...). If all of our characters were under a single house, I think it would be fun to have various assigned roles. 

With background for the universe, I like the idea of our dark elves being from another plane of reality, but I feel like that would involve more of a "tiefling" from D&D vibe than the "drow" vibe that you are looking for. Both would be fun to play, though. 

Really interested in a discord server if you'd like to make one!