Well, there are Komodo Dragons...
Yes, and boy are THEY ugly giant lizards. I watched a bit about them on Animal Planet... watched them eat an entire boar corpse. The only thing they left behind was the grass in its stomach. They were literally cramming the body parts down their throats by slamming them into trees to get them to go down their throats. Even the head.
Nearly the most disgusting thing I've ever seen in my life.