Who is most similar to SF4's Juri?

Hard to say... depends how you play Juri. There isn't really any character in the game right now that has a safe dive kick and zoning in the same way Juri does, and there's no character that has the flavor of Feng Shui Engine. Fulgore is a good fireball zoner, but his offense is fairly different from Juri.
The developers showed off Cinder today, though, and it looks like he might have some Juri flavor to him! So stay tuned to that, Cinder comes out at the end of April.