Following my formula from the 2007 2008 thread
2009 - On the WWE Title side, we had Jeff Hardy, Edge, Triple H, Randy Orton, Batista, John Cena, and Sheamus holding the Spinner Belt, while on the World Title side, we had John Cena, Edge, Jeff Hardy, CM Punk, and Undertaker holding the Big Gold Belt. On the ECW Title side, we had Matt Hardy, Jack Swagger, Christian, and Tommy Dreamer holding the Platinum Belt.
2010 On the WWE Title side, we had Sheamus, John Cena, Batista, Randy Orton, and The Miz holding the Spinner Belt, while on the World Title side, we had The Undertaker, Chris Jericho, Jack Swagger, Rey Mysterio, Kane, and Edge holding the Big Gold Belt. On the ECW Title side, we had Christian, and Ezekiel Jackson holding the Platinum Belt.
From the Main Event scene alone, I think 2009 takes this but by a very slim margin.