Great request, and I think you may be in luck, with some nice choices over the next couple weeks?
A quick scan of Eros DC Visiting reveals the following potential NQNS candidates for your perusal?
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Busty Latina Vanessa of UltraGFE.com, $$1/2, is in town this week. I saw her again yesterday in DC for a fine GFE+++ session!
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Her best friend, Monica, $$1/2, UltraGFE.com, arrives in DC on Monday, for 2-girl sessions with Vanessa (!). I saw Monica last week at BWI, and I am still recovering from her excellent NQNS denouement! 
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Blonde Maggie, $$$, is in via Samantha, on Eros DC Visiting, looking better than her Eros pics, and when last I saw Maggie in DC, her NQNS technique was smooth and throaty!
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A rare GFE++++ girl, Sissy of BDJ, $$$1/2, is also in DC this week, and is one of the sweetest, cutest, best-performing girls in the biz, in my most humble experience!
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Finally, although I have not been blessed yet with her company, Lauren is in DC from SFE, $$$, and appears to have a solid NQNS repertoire from her Review text! SFE is a well-established agency, with solid credentials.
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All the above girls are well-reviewed, and are certainly not placed above in any precedence.
Pics and subsequent Reviews for two of the aforementioned girls are in the courtesy link below! Enjoy!
Good luck, and please travel safe!
dc!