1) Chris Jericho - WWE, WCW, ECW, NJPW & AEW
When fans think about the biggest names still active in WWE or AEW, Chris Jericho is at the top of everyone's list. Jericho has been going strong in the business for four decades now. After stints in Japan and Mexico, the Lionheart showed up in ECW and became the Television Champion. This allowed him the opportunity to get signed by WCW.
Chris Jericho had a long run at WCW and was successful on many levels. He initially made his home in the Cruiserweight division, winning the title on four occasions. Jericho went on to win the Television Championship as well. Despite his popularity, he hit the glass ceiling and went on to sign with WWE.
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In one of the greatest debuts in WWE history, Chris Jericho arrived on Raw in August 1999 and confronted The Rock. Jericho was able to win the Intercontinental and European Championships in his first year in the company. He put on exceptional bouts against the likes of Chris Benoit and Triple H at the time.
His biggest success came in December 2001 when he defeated The Rock and Stone Cold Steve Austin on the same night to become the first Undisputed WWE Champion at Vengeance. Despite that big win he was usually in the upper-midcard of the promotion. It changed after his hiatus from the company, and subsequent return in 2007.
Chris Jericho entered a superb rivalry against Shawn Michaels that finally cemented his spot as a top star for the WWE. He evolved as a character into a more serious "Honest Man" persona, once again winning the World Heavyweight Championship and putting on an all-time classic with the Heartbreak Kid at No Mercy 2008.
Jericho won the World Heavyweight Title again in 2010, but he was more used as an enhancement talent for established superstars as well as up-and-comers in WWE during different stints from 2012 through 2016.
His final run in the promotion saw him evolve again and become wildly popular using The List of Jericho. His feud with Kevin Owens was one of the best of 2016-2017, but never got its due at WrestleMania.
Chris Jericho made history when he left WWE and arrived in NJPW to feud with Kenny Omega. Omega and Jericho put on a Match of the Year candidate at Wrestle Kingdom 12 that is viewed by many as the most influential encounter of the past decade. It was that bout that heavily influenced the arrival of All Elite Wrestling in the business.
AEW has become the first real competition for WWE in over 20 years with Chris Jericho at the forefront. The Demo God was the first ever AEW World Champion and helped establish the company. Le Champion has helped elevate that title, as well as many young talents like Orange Cassidy, Sammy Guevara and MJF, among others, in the first two years of All Elite Wrestling.
Through a thirty-year career and five major promotions, Chris Jericho has gotten over and maintained his signature ring name the entire time. That's why Jericho is the former WWE superstar that most fans will think of when asked about someone who has kept their same ring name in multiple promotions.