Danmachi has multiple RPG elements to it but a lot of rule breaking cheats to help the plot go forward. The lore/world building is expansive, most story arcs are good. It's better than it looks overall. And the OST is beautiful.
You'll have to make do with cheap animation, some fan-service (thankfully a lot less than the title would suggests), a pointless harem (MC is fixated on one girl and the story would fall apart if not) and plot armor.