Batista isn't, because he got the benefit of an amazing push with proper build. Mostly anyone could be as big as he was in his position. All you need to be as big as Batista is moderate charisma, a decent build and a good push.
Orton and Sheamus have definately failed to produce. Orton is the biggest failure in the history of wrestling in relation to how he's been pushed and what the results of that push have been. He's an uncharismatic worthless hack with no mic skills and no idea how to wrestle. He draws NOTHING. Ratings sink every time he holds the belt, nobody will ever pay to see him. 8 world title reigns later and he's fit to run no brand except a glorified ECW, he can't be trusted with anything of moderate value. They gave him plenty of shots on Raw and he's blown them all. As for Sheamus? Yeah, he's really producing. That's why he went from 2 time WWE Champion to feuding with Daniel fucking Bryan.