I have this mare: http://www.pedigreequery.com/nadia15
and this mare: http://www.pedigreequery.com/phantom+whisper and they have no Native/Northern Dancer blood.
I got them from the same breeder, who repeatedly bred them to his stallion, who ALSO has no Native/Northern Dancer,
http://www.pedigreequery.com/sentinel+star
These combinations failed to produce runners over and over again, but have produced 2 eventers and 2 hunter/jumpers so far I have the 2008 colt out of Nadia and the 2008 filly out of Phantom Whisper. Interestingly, the Nadia colt has Total Hunter movement. Too bad I breed for eventing, lol. The Phantom Whisper filly has the most beautiful, floaty, uphill dressage movement, and her full sister and brother are eventing.