Neither Dark or Westworld are very ambiguous, as there's lots of explaining. You do almost need a flowchart or visual aid to get it all, but there's not much left open to interpretation.

Twin Peaks I'd say is the one where things happen and you kinda get some reasons, but part of the vibe of the show is that there's mysterious shit in the universe none of us can ever really understand. As far as literal ambiguity goes, it wins.