I know maybe you do not suppport 1.7.2 anymore, but there is a small issue with TC golem animation. Even TC golems are humanoid mobs (like pigmans, skeletons and zombies) they do not move their head during mouse movement, but the entire model being rotated. It's a tiny screenbug, but I'd let you know.

I am not sure it's caused by TC golems are 1 block tall mobs.

Yeah, a lot of mod mobs show up funky on the main menu due to having a weird/wrong rotation axis on the head or other limbs. It's not something that I can control.