Some really good suggestions so far. I really love the Demon in the neck. I also really love the Jazz in the neck. Both of those give a very even tonal response, and are clean and clear. I'm also a fan of the Pearly in the neck...it has a character to it but it usually sounds great with just about any bridge pup. I've not tried the Full Shred, but it is probably a good choice if you want a bright, thin neck sound. I'm not a big fan of the 59 in the neck mainly because of the uneven EQ...heavy on the highs and bass but thin in the mids. For me, that kind of eq is hard to balance in the neck where I prefer to have a more even eq.
Others have said that the Jazz and the Demon are very bright, but I don't necessarily see that, although it can seem that way depending on the bridge pup and amp settings. I find those two pups as having a very even eq which makes them so easy to to adjust amp settings and they play very well with most bridge pups...especially a Demon.