Yes, they're bigger, but that doesn't change the fact that a Knockback X or XX item will send players 30+ blocks in a given direction; and villagers would either have to be extremely plentiful to the point of being annoying or immobile in order to be effective, or they'll go flying right off, too, moreso than players since Knockback hits mobs harder.
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Well, the forums aren't dying, and neither is my map series on Java.
Check this thread for details or click this link to join the maps' Discord server (the join link is permanent and I am online daily, despite what random post you found this on in 2015).
This is Tumble though, so there wouldn't be any villagers. Do you play on Mineplex as well as Hypixel? Mineplex actually has THIS Slaperoo minigame, and that is where I came up with this idea. This might give you an idea of what Slaperoo is like. If you don't play Mineplex, this is the server information: