Have you tried NJPW or NXT?
NJPW is the biggest Japanese wrestling promotion, and very old-school. Lots of clean matches, not too many outrageous gimmicks, top notch in-ring action, even longer match times pretty frequently. They just finished their G1, a big two-week tournament for a shot at the top title. You can check out some of the matches online, see if they catch your attention. Try googling Kazuchika Okada vs. Kota Ibushi in the 2019 G1. That's sort of a "Bret Hart vs Shawn Michaels" matchup, with Okada, who had maybe the all-time greatest title run in NJPW and is the heavyweight champ and Ibushi, the risk-taking hotshot who holds the midcard belt:
https://www.dailymotion.com/video/x7fo60n
NXT is the WWE's "alternative" wrestling, a throwback to an older era where they train people before putting them on national TV. They have occasional longer matches (though very rarely something like an hour) and a big focus on in-ring action over promos and drama, though they do still have silly gimmicks sometimes. If you want to check that out, I recommend Adam Cole (the current champ) vs. Johnny Gargano from a couple PPVs back:
https://www.dailymotion.com/video/x7a59g5