#4 Angelico
Like Matt Cross, with whom he held the Lucha Underground Trios Titles, Angelico is probably most well-known to fans who saw him in Lucha Underground.
He was one of the first wrestlers to make an insane jump off of a balcony into the middle of the ring, and it was probably one of the moments that defined the first season.
Unlike Cross, however, is the fact that Angelico asked for his release from LU back in the Spring of 2018. He has been on WWE's radar since the first season of LU, but apparently turned down an offer from WWE back in 2015.
Since he's such a talented high-flyer and striker, he may eventually show up in either NJPW, ROH or All Elite Wrestling. He's known enough in the business to make an impact and he's currently a free agent.
The word exciting doesn't even start to describe his style, so he'd be a great signing for any of the major companies. He has done a lot of his work in AAA so he might return to Mexico or he could travel to Japan.
He's from South Africa, so he apparently doesn't have an issue with travelling. Angelico has also competed for wXw, so add Europe as another continent he has competed on.