#2 Rey Mysterio
When you talk about the greatest Luchadors of all time, Rey Mysterio is the one who tops the list for many. The Master of the 619 has made a pivotal contribution in establishing the fact that size doesn't matter if you have the talent and passion to succeed in this business.
Since returning to the company in 2018, Rey Mysterio has taken the entire WWE Universe by surprise due to his highly agile wrestling-style - even at the age of 45. He is a perfect example of someone who keeps getting better with age. But at the same time, he has made it clear on numerous occasions that he might not have much time left in his in-ring career.
Last year, we saw Mysterio's son Dominick being highly involved in his father's storylines, which led many to believe that he will make his in-ring debut. While we haven't witnessed that yet, it still looks to be the direction that WWE would want to take soon. Be it a match against his father, or a tag match alongside him, Dominick has a great start lined up for him.
Once he debuts, we might see Rey slowly winding up his career. While WWE can book a retirement angle for him, he'll probably still show-up once or twice a year to set up a match and put over some younger talent.