If the group overall can get healthy and stay healthy who ever it is is really going to have a hell of a year. They all have the abilities to show a great game. Hollins in IMO gives the best in coverage but Lewis and Obo could become real forces in the rush. I would say the one who holds up best against the run would be the starter (health concerns gone).
Since their rush games are already pretty solid I'd say the one who handles the run, can keep their edge in the run game would be the starter. That's why IMO the LB groupings will be the positions to watch in TC and pre-season games.....real dog fights.(ILB as well)