I had a bunch of GW (Games Workshop) Inquisitor models laying around and I finally got busy and pinned a bunch. Yes you will need to pin them because at 54mm they are quite big.
It's a pity that GW only came out with one Space Marine pose. I have another one that I am thinking about converting. It will require the legs to be cut and maybe the arms for a different pose. I will also need to get a Space Marine head.