>>9954869MotU Classics Modulok is the one you want. He had a more detailed sculpt, each limb had knee/elbow and ankle/wrist articulation and the arms, legs and body segments connected with ball joints instead of the old pegs only allowing swivels.
That was the second-ever Modulok and the only newer one until Mattel licensed MotU out to a company called Super7, which made a new sculpt at that same size that only included body parts seen on the old cartoon and a bunch of "retro 3.75" figures.
A Modulok for the new Origins or Masterverse lines hasn't even been announced yet, meaning it's probably at least 12 months away.