My vote for naked skeletons is still the old (1986) GW ones (available until 1998), they're usually quite readily available second hand for a decent price, easy to assemble and still with enough scope for different poses. The WGF ones (I've never seen any in the flesh) have a bit more of a Jason and the Argonauts feel, more options for customisation but they also appear more frail and require more work to assemble.