4 in bag end
4 in Goblin halls? (4 dwarves, 2 goblins 1 giant goblin king = moria)
3 in warg attack (3 dwarves, 2 goblins, 2 wargs = weathertop)
0 in riddles in the dark
Wich leaves 2 dwarves left, assuing Bilbo and gandalf doesent fill any "good guy slots" in those sets