I love
Natasha. I think it has two vibes at once: the mentioned "trashy" vibe, but also a "quirky and born rich" vibe. I think Russian names - and especially diminutives - lend themselves very well to eccentric aristocrats. I don't like
Natacha, it makes it looks... confused. Natascha, however is bold - I don't particularly like it but I respect it.
For middle I like
Natasha Simone.
I'm not too fond of
Nina. But I get strong "thinking outside the box" vibes from it. Also,
Nina on its own is miles better than as a nn for any longer name. I think this name works best just on its own but some combos I enjoy would be
Nina Celeste or
Nina June.
Nadia is one of my favourites. I know one who's middle name is
Olga, so how's that for bringing it down to earth? XD She hates it, and it's hard to not notice how aggressively eastrn european the combo comes across so I get it. I personally don't think it needs any bringing down, after all it's already a nn for a longer name, which doesn't give it a very elevated feel. I like
Nadia Marceline or
Nadia Pearl.
https://www.behindthename.com/pnl/109883