The only other series in the LitRPG genre I was able to finish was Mark of the Fool, and it’s more genre adjacent than heavily RPG element focused. It’s also nowhere near as good as Carl, so YMMV. You can try digging through Royal Road, since thats the site the pioneered the concept, but most of the works on there are in progress. I couldn’t make it past the opening chapters of He Who Fights With Monsters, but it might get better?
As for Sanderson, Mistborn is fun, I started Way of Kings and it seems interesting. I also recommend you try James Islington or Brent Weeks, but where I’ve really liked their works a lot of other people seem more mixed (Lightbringer is WAY better than Nightangel).