Share the sentiments of not understanding the overness of Hardy, but I'm not ignorant enough to ignore it.
What company would he make a bigger Impact, easily TNA. Jeff Hardy brings the one thing that TNA has lacked to get. Oh sure, TNA has big name stars in their company, the problem is, none of those guys are relevant by today's standards. Hulk Hogan, Huge Name, The Undertaker Outdraws him. Ric Flair, big in the 80's, Shawn Michaels is more relevant. It's the nature of the beast.
Jeff Hardy though is a legit WWE Main Eventer. The guy closed the 2nd biggest pay per view of WWE's calendar last year at Summerslam. He was involved in a title match at the Royal Rumble. Simply put, the guy has massive exposure, to a big, young crowd, and Jeff hardy is the key to brining crossover audience, if not full fledged converts to TNA.