Thanks, all!
They work very well, particularly as an armoured troll type character. There's a slight LotR feel to them, no?
Yeah - though maybe more of a Silmarillion feel? For matching the Olog-hai/"hill trolls out of Gorgoroth" description, I don't think anyone has surpassed the Citadel efforts from the 80s:
"... came striding up, roaring like beasts, a great company of hill-trolls out of Gorgoroth. Taller and broader than Men they were, and they were clad only in close-fitting mesh of horny scales, or maybe that was their hideous hide; but they bore round bucklers huge and black and wielded heavy hammers in their knotted hands. Reckless they sprang into the pools and waded across, bellowing as they came."


But for Morgoth's armies - or the troll-bodyguard of Gothmog - I think these Russian chaps would fit the bill nicely. There's often a suggestion in Tolkien that evil technology (including monster-breeding) was more advanced in the earlier ages of Middle Earth. And there are couple of associations of trolls with giant orcs (the Appendix description of the Olog-hai and a line somewhere about how the Elves didn't really distinguish between trolls and orcs).