I'm quite curious for answers here as well. I've been thinking about converting a hero for a while, but i don't want him to look so skinny like regular saurus (perhaps cover him up with armor?).
I've converted several of the metal temple guard models, giving them the calvary riders weapon arms. They look decent and stick out in a group of saurus and even the new plastic temple guard. I made my Gohrok the same way, except his shield is a leg piece of a 40k Defiler.
I also wanted a more heavliy armoured hero. I stuck skink sheilds to my temple guard champion which made him look like a scar vetran with lots of armour.
i am using a old metal temple guard champion as a bsb. im scratch building the actual standard then adding a few thing to the actual model to jazz him up a bit