I think he has been one of the best wrestlers in the world over the last five years or so. I am actually lower on his AEW stuff then his traveling the world indy work which preceded it (although I am thrilled he got his shot)
Since 2016 I rated 18 matches of his EPIC in my C+A Eddie Kingston
http://segundacaida.blogspot.com/2018/09/complete-and-accurate-eddie-kingston.html
All of these were pretty under the radar, but absolutely incredible, he dropped gems against LA Park, Daniel Makabe, Tre Lamar, Babatunde, Tom Lawlor. It almost didn't matter who he was in with, he was going to elevate it.
I have also dug into his pre-2016 stuff and found some real killers which aren't really super hyped. There is an amazing Low-Ki match which is really minimalist and brutal, a CZW Joker match which is as violent as wrestling gets, in addition to more hyped stuff like the Hero feud. Wouldn't shock me if King ended up being my highest rated US worker of the 21st century.