Createrhoof gives all your creatures trample when it comes into play, which is pretty good on its own, but also gives them all +X/+X, where X is the number of creatures you control
Most of your ramp isn't creature based but still takes advantage of having creatures
In practice, the best Angel commanders in MTG usually give you one clear engine (ramp, protection, or lifegain payoff), and doubling up commanders tends to dilute that plan instead of strengthening it
Indoraptor is only playable in eternal formats like Vintage, Legacy, and Commander
Cards that replace themselves in your hand or give you Treasure as part of their abilities are good to consider, since youll need some form of ramp to keep casting three spells per turn