Breakfast Topic: The game's most famous rare

I was taking my main through the new set of Northern Barrens quests recently when I found myself running across rare spawn mobs a lot. This in itself isn't all that surprising; you'll run across rare spawns pretty commonly whenever zones aren't occupied by eager levelers. I sawElder Mystic Razorsnout, Swiftmane, and for the first time ever, Humar the Pridelord. Humar is well known as a popular hunter pet, and until Wrath, he was the only black lion in the game.

And that got me to thinking: What is the game's most famous rare spawn? If I had to settle on one, my vote would be the Time-Lost Proto Drake, which has driven legions of players to the nuthouse in an endless struggle to find it, let alone kill it. Close behind would probably beLoque'nahak, another famous hunter pet. Curiously, it feels like most of the game's really well-known rare mobs are actually fairly recent additions to the game, although people who played during classic WoW might disagree.