#4 - Dolph Ziggler

Fun fact: Did you know that Dolph Ziggler has been employed by the WWE for 13 years? That's right - he signed with the company in 2004. Fancy that.
As you all likely know by now, Dolph Ziggler was a record-setting amateur wrestler for Kent State University in Ohio. Though his records have since been surpassed, 121 wins are still pretty damn impressive. Judging from his pro-wrestling style, I imagine he was a deft and scrappy amateur wrestler in his heyday. I picture him as the kind of guy who could shoot in for a take-down so quickly that his opponents wouldn't even know what hit them, then they'd be on their back before their brains could even register that they were on the ground.
R-Truth wanted to 'kill' former WWE writer. More details HERE
As we've learned from guys like Brock Lesnar and Bobby Lashley, amateur wrestling experience can be a huge advantage in MMA. Couple that with Ziggler's speed and never-say-die spirit, and you've got some serious potential for success.
And hey, with rumours buzzing about that he's on his way out the door, who knows - maybe he could have a cup of coffee in Bellator or something.