#2 R-Truth
He may be the current United States Champion (in his second reign), but it's clear that the WWE have never truly seen R-Truth as a main eventer.
Despite a brief flutter at the top in 2011, Ron Killings has firmly remained part of the mid-card, in entertaining and athletic matches.
This is why it will shock many fans to discover that Truth has been in four, yes four, Chamber matches.
Just to put that into context, Truth has competed in more Chamber matches than the likes of Batista, The Undertaker, Daniel Bryan, Jeff Hardy and Roman Reigns.
Whilst he may have never won one, Truth does have an elimination to his name, eliminating King Barrett during the 2015 Chamber pay per view, which saw Ryback capture the vacant Intercontinental Championship.