Bisbing was a good surprise. He's got all the right tools, in addition to being patient and confident.
Pray Rashad doesn't learn a few submissions, and improves his hand skills, particularly using his elbows, because he could finish fights and the light heavy wieghts will have problems. You can't take enough drugs to match his stregth on the ground, and his hand speed/power make standing up a dangerous walk in the park.
Ed Herman doesn't have the head for a champion. But he will be a good contender.