You should check out Dungeon World (or any Apocalypse World derivatives) - every role is 2d6+ability modifier, and results are always 10+ for complete success,

You should check out Dungeon World (or any Apocalypse World derivatives) - every role is 2d6+ability modifier, and results are always 10+ for complete success, 7-9 for success but with a caveat, and <=6 as a failure. You're allowed to do anything that "makes sense" given the fiction, and it is so much more storytelling focused than D&D etc.