Hello there,
can anyone answer me a question: What thrall fits to the workman work bench?
Thanks. 
Hello there,
can anyone answer me a question: What thrall fits to the workman work bench?
Thanks. 
Not sure which one you mean but perhaps it’s one of these:
Wheel of pain: taskmaster
Torturers bench: taskmaster
Artisan bench: carpenter, blacksmith, armorer, tanner, smelter
Firebowl cauldron: alchemist or Cook
If you mean the Artisan’s Worktable, you can put a Blacksmith, Armorer, Tanner, or Carpenter I believe. Probably a Smelter also, though I’ve never had a T4 Smelter that wasn’t sitting at a Forge so not totally sure.