I love the idea of this becoming a spam thread...so this sumbitch will be closed eventually.
Anyway, there are quite a few stars who would be more over in TNA because of the lack of competition. CM Punk is perfect for their brand. He's marketable, and can wrestle with the best in the world. The Miz would suck out loud in TNA and be buried by Nash, Angle, Jarret, etc. Same goes for Jamie Noble. IF Noble found a reasonable gimmick, then he'd be an OK wrestler. William Regal is another who comes to mind. He'd be great in that style of wrestling. Kennedy would be also, but he'd have to change his name...and gimmick. Unless he buys it.
My point is whether they're suited for TNA or the WWE or ROH or AJPW, it really doesn't matter. Personally, you can trade talent and the WWE would make as much money with that talent as they would with the current roster. It's called MARKETING! TNA does not market it's product. It gets buried by Dana White and the UFC. The WWE is it's own entertainment company with studios, and is publicly traded on the stock market. It's world recognized. So whomever jumps to TNA may be more suited as far as a wrestling standpoint, but if you want to be a big name and aren't already, then you need to go to the WWE.