I like your third tow truck model, with the long arms, as it feels like it has a personality all its own.
I also think that there's some promise to your MetalBeard's model, but I'd suggest going with something other than a dragon in the big model. Perhaps a shark? That would fit with his character quite well, and I think you have all the parts to do it in that set.
If the above post didn't offend you, you're probably reading it wrong.