Best solo classes in Classic?

[Midoo]

I want an alt for when I'm bored of my Shaman. Usually I'd go for Necro but since we don't have Iksar yet I feel like the other NEC races aren't worth it. At least as an Iksar you're KoS everywhere but it's offset by great AC and regeneration which means you're meant for the minmaxing solo life.

So what are the best solo classes for Classic? (preferably in order)