Maybe that's a bit harsh. I feel like Tannehill's ceiling is Romo or Jay Cutler. Good but not THAT good. But he may very well prove me wrong. The Dolphins are such a trainwreck though.
But I'm the idiot who had concerns about RG III because he's going to run around too much and get his head bashed in. He has the potential to be a legend but he's not a linebacker like Cam Newton either. It's amazing to watch the guy run though, truly special, and he's got the arm to go with it. He just needs to stay on the field.