Have a look at some of the Tamiya figures, dogbone.
I seam to recall that they do not have their "weapons" moulded into their hands, and you can, more often than not play frankenstien and swap arms and legs to get the pose you require.
WWII tank crews could be good, (=men in boilersuits and caps) The did a field kitchen crew that was pretty generic and caould be made into a whole buch of poses.
Most arms and legs can also be adapted by prudent use of a micro saw, a heat sourse and a dollop of filler!