Neanderthal
Arcane
The thing with (A)D&D thieves is that outside a tabletop game, or a game specifically crafted for them, they kinda suck. They shine out of combat, and if a game doesn't have a lot of out-of-combat content, they're just deadweight. None of the party-based D&D computer games did. Josh did the right thing by not cloning AD&D thieves in a game that didn't have the content to support them.
See theres the problem for me, hardly any CRPG has content designed for specific classes and out of combat roles, its not just thieves and its not just Obs fault, but nobodies bringing this up. Wizards, clerics, fighters even, almost every class exist solely to fill a combat role because worlds are dead, painted backgrounds. We should be far, far beyond this by now.