Depends what you liked about them.
If you liked the soap opera stuff I guess check out HUSTLE. That said it's all in Japanese so it might be better to watch youtube videos about it other than actually watching it. The only matches I can really recommend are like.. anything where RG gets the shit beat out of him. Or the main event from HUSTLEMANIA 2007, and even that I don't love, it's just the most HUSTLE match HUSTLE ever did.
If you like the bombastic style of the Smackdown six and the Radicals, I'd actually suggest you watch these in reverse chronological order for your first viewings, AJPW and NJPW from the late 80s and to the late 90s and 2000s NOAH.
If you like tough guys beating the shit out of each other and want to see it turned up a notch Big Japan from like 2006-2012. Heads up, most shows are mainevented by death matches, and it's not undercard fags hitting each other with cookie sheets and shiny trash cans like you're use to.
But overall, the best match is probably going to be FMW. If you like the attitude era, you're already fine with a weak undercard, lol. And the death matches are far more rooted in the characters and drama than they are in the gore. They even started doing a bunch of Russo-esque bulltshit when they were going out of business.
