#4 Chris Jericho (never joined a faction)
Chris Jericho is currently one of the top heels on AEW TV and is known for always coming up with innovative ideas to freshen up his character. Jericho was a popular act in WCW and fans were elated when he made his way to WWE in 1999. Jericho has since had multiple stints in WWE but never joined or formed a faction.
He was a part of Team No Respect during his FMW stint in 1998-2000 and formed The Inner Circle in AEW years later, but nothing of this sort happened in WWE. During his WWE run, Jericho formed tag teams with Superstars like Edge, Big Show, and Christian.
His split with Christian came about in 2004, leading to a WrestleMania match that was won by the latter. Edge and Jericho were together on WWE SmackDown in 2009, but the former's injury led to the team getting disbanded and Jericho ended up berating Edge.
The duo fought on the Road to WrestleMania 26 upon Edge's return and Jericho beat Edge at The Show of Shows in a World title match.