Of the wrestlers, I think Edgar beats him for sure, using his footwork. I think I'd pick Mendes by KO. I think he'd beat Lamas, but it could go either way. Bermudez has better standup and the wrestling and therefore a good chance, but unfortunately I think he would get caught and KTFO. I think he beats Lentz and Guida because I don't think they can get takedowns or win on the feet. Elkins has a height advantage but I'd pick against him for the same reasons as I did Lentz and Guida but I don't think he's as good as Lentz and Guida.
Of the non-wrestlers, Jose Aldo and Hacran Dias are his teammates. Conor KO's him. I'd pick Holloway to get the finish too, but there's a danger Barao can get him down and outgrapple him. Swanson is in the same boat as Holloway, but he seems to not be as motivated any more, and he doesn't have Holloway's height advantage. I think Charles Oliveira is a better fighter than Barao, but his chin/defense is an issue. I'd hesitantly pick Oliveira to win. I think Jeremy Stephens would brawl with him and it could go either way, but Barao could get takedowns too so I'd pick him. Barao starches Dennis Siver.
Edit: I'd expect him to be ranked about 5-8 I guess.