Prabably Zachary Levi. I saw a picture of him doing the vulcan salute :)
If Zachary Levi knows about Nerdfighters, he is one. CHUCK!!!!!!!
Cameron Monaghan who plays Ian Gallagher on Shameless US is a nerdfighter! or at least he has mentioned nerdfighteria and DFTBA on his twitter, and said he loves Looking fo Alaska.
I've heard that Kimya Dawson is a nerdfighter... I must verify this.
(she is a musician, best known for being on the soundtrack to the movie Juno)