I read LOTM until chapter 550 and I gotta say it's really, really dragged out and overly dark/heavy at times. I had to put it on hold as a result. I personally like "The Hunter of the other world is being misunderstood"
https://www.novelupdates.com/series/the-hunter-of-the-other-world-who-is-being-misunderstood/
it's somewhat new and quite popular in Korea right now. Kinda similar to Onepunchman and Hero Academia, too.
A lot of people also like Debut or Die (the novel), it's has constellations and parallel timelines like ORV but with idols, so yoh can give it a try too.
It happens much later, around ch. 300-400 if I recall. The manhwa's gonna focus on Testar growing as a group for now, they're gonna quickly rise in popularity and come up with all sorts of interesting concepts/performances. Also there'll be another regressor who knows more about the system than Moondae, and Moondae's gonna end up in a parallel reality around (around ch. 200-250 and later on)
Any recommendations like this aside from TCF? So smth that has depth not just OP characters.