Of my 3 higher level toons, I would say the hunter is by far my best booster.

Low level boosting with a priest works well. I let my alts follow right behind me. If they get aggro, I just spam Holy Nova. It kills the low level mobs and heals the alts.

Low level boosting with a lock wasn't terrible but it wasn't even as good as with my priest. It was slow and time consuming. If I pulled too much, there wasn't much I could do other than hellfire to kill the mobs fast. It wasn't pretty. I won't be doing that ever again and I certainly wouldn't even attempt a higher level instance with her.

I also boost with my hunter though, and the difference is amazing. It is SOOOO much faster with my hunter. I one shot a lot of mobs with my auto-shot. I've boosted with my hunter up through Scholomance/Stratholme so far. You shouldn't have any problems with it. If I pull too much aggro (on purpose sometimes), I just drop an immolation trap and that takes care of a lot of it. The hunter worked great in ZF, serpent sting them as they come up the stairs, immolation traps at the top of the stairs and pet on aggro. I almost never have an alt die, so not having a rezz'er isn't an issue.

People always talk about boosting with a pally and that seems fine. From what I've read though, it seems like they have to micromanage a bit and park the alts at specific points along the way. With my hunter, my alts stay on follow. Things die so fast that if an alt grabs aggro for a split second, it doesn't matter.

My hunter's gear isn't that great. I have a few LW epics, but the rest of my gear is just blues. I don't think you would have any problem using your hunter for boosting.