A Character Without A Main?

Now obviously this is an impossibility from a realistic standpoint. Every champion in this game has at least one person who "Mains" them. I refuse to believe that it's possible for there to be one who doesn't. Refuuseee-o! However as time goes by mains change and certain champs fall into and out of favor. So therein comes to my question... If you had to pick a bunch of champions who you think probably have the least "Mains" currently which ones would they be?
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