So... The Allosaurus! The off-brand, extroverted Carno!

The Allosaurs can be treated a lot like the other theropods on the ark: big, scary teeth, eat meat, kill things. However, the Allos have a buff: when in a group of 3 or more, the highest level allo becomes leader and gets buffs! Perfect for taking on bosses, or that one annoying friend who constantly persists on staying on the beach...