If you think Ra's al Ghul is a simple archetype for "warlocks" then you havent read enough material with him, or his family, featured. He is quite easily in Batman's top three villains. If not at the top. I mean he single handedly (with the indirect help of Batman himself) dismatled the ENTIRE Justice Leage. NO ONE else can lay claim to that. The movie version sucked a fat one, and was barely a reflection of who the character is and what he means in the comics. Then again maybe that's why you enjoyed it.
Yeah there are legit reasons as to why THEY suck.
But Ra's al Ghul is one of the most well thought out, deeply developed characters in the Batman universe.
But to each his own.