#1 Santino Marella

No-one in their right mind ever thought that Santino Marella would enter the Elimination Chamber.
But in 2012, the Milan Miracle did just that, after he replaced the injured Randy Orton in the SmackDown Chamber match.
Top WWE star punished? More details HERE
Whilst few people believed Marella would win and enter WrestleMania 28 as World Heavyweight Champion, Santino did give it his all when he entered the match at #4
Eliminating Intercontinental Champion, the master of the Cobra would also eliminate Wade Barrett, leaving the match between him and Champion Daniel Bryan.
A former US, Intercontinental and Tag Champion in his own right, Santino was able to hold his own against Bryan, but was eventually caught in the LeBell Lock, with the Milan Miracle having no choice but to tap out.
The most unlikely Chamber entrant, Santino proved anything can happen in the WWE.