IC and Advice: Need a New Fantasy Game
I'm not that familiar with Shadow of the Demon Lord, but it's class-based, right? I agree that freeform is a bad choice for a dungeon crawler, but it does allow for a lot more freedom in what kind of "adventurers" can work. I'd recommend something point-based, like maybe Mutants and Masterminds 3E - it's very generic if you just leave off the modern equipment.
Don't change anything on my account though, it's just a suggestion.