How very true.Eliam_Dar said:maybe this guyThe Maddest March Hare said:Torvosaurus. It wasn't the biggest predator around but with a name like "Savage Lizard", who's going to tell it that to it's face?
http://en.wikipedia.org/wiki/Giganotosaurus
or some of these
http://en.wikipedia.org/wiki/File:Largesttheropods.svg
However, I reckon even most of those combined would struggle with an adult Amphicoelias Fragillimus. Especially considering T-Rex was most likely a wuss, and Spinosaurus seems more like a fish eater than major predator. That jaw wouldn't really stand up to much from very large prey.