On talent alone and not club grown/ homegrown status? Probably only Sturridge, and even he might be a push with his attitude and unwillingness to accept not being the star man. A peak SWP would be a useful supersub/squad player, but he was always a bit too erratic to be a regular starter at a top team. A peak Micah would obviously be in the squad. Barton might just of been good enough to be a squad man, but his attitude would never of been allowed, especially for someone as unimportant as he would be. Michael Johnson is hard to say, as he shone so briefly it's impossible to know whether he'd of become a world beater or just another english player who never kicked on, he's got a bit of a Diana thing going for him now.
None of these players ever really became regulars in top teams, except maybe Sturridge (briefly).