In your opinion who would have legal standing?
Beats me. The one clear thread in all I've read is establishing standing in any suit is difficult and it's meant to be. If you're going to sue someone then it should be difficult. You should required to show just how and where a person's actions invaded your legally protected interest, and that injury should be real and immediate and not hypothetical or potential. So where is the injury in any of these cases? Other than a grumpy dissatisfaction that Obama is president I'm not seeing any. Am I happy that Obama is president? No. Would I be happier if someone else was in the Oval Office. Sure. But my displeasure isn't enough to justify a suit, even if I was conviced he was born on the third moon of Venus or some such place.
You want Obama out? Then there is only one way you're going to accomplish it - produce solid evidence that he's lying and wasn't born in Hawaii as he claimed. Start waving that around and you'll get your day in court. And you won't need legal standing to get it.