Actually I did mention that Taylor is the closest to the mold that Riley likes. I've seen several places where they've said they like a bigger back. Both Ozigbo (5-11, 220) and Thomas (6-0, 190) are bigger backs. Thomas has the frame to add weight and I bet he'll be over 200 when he gets to campus in a year. Stevenson isn't as tall but he's well put-together (5-9, 205). Newby is close to that size (5-10, 200) but Wilbon is a little smaller (5-8, 190).
Cross (6-1, 240) is obviously a big back but he just doesn't have a big of a skill set as the others do. It's pretty obvious when he got moved down to the white team for the Spring Game after working with the Reds all spring.