Swap Iguanadon for Equus for my tastes... Very low stam drain, so you can run forever, great berry harvester, you don't need a saddle, but when you do get a saddle it works as a Mortar and Pestle, and it's back kick adds torpor so you can tame without tranqs.
Yeah, Iguanodons are so cool! They are also fairly fast so they can get away, and I found out while filming they are a bit stronger than I thought. Such cool tames!