Farmer skin line
There are 7 champions who could possibly fit into the concept the first being farmer nasus
cause he sits top and farms all match. farmer nasus would have all aoe spells create a corn field. he would have a straw hat and a hoe instead of an axe. corn field fiddlesticks
would have straw in his mouth instead of the green mist with straw coming out of the stitches, when his passive activates a post pops up behind him and he hops onto it and hangs in the field of justice scaring away swain. Barnyard kindred
would have lamb be the sheep and wolf be the sheep dog. during wolves territory and the ult a fence post pops up around the edges to keep lamb in while wolf herds her. Rooster r\Rakan
and Hen Xayah
would as the name implies be chickens. during rakans recall he struts back and forth trying his best to look threatening but he's amazing to be scary while Xayay lays in a nest to lay an egg. Barncat Rengar
and Field Mouse Twitch
rengar would be an orange barn cat who hunts through the piles of hay for that pesky little rodent twitch who is always hiding somewhere blending in with the hay. when twitch goes invisible a splash of hay appears around him instead of the green mist right before he disappears.
I know it's a lot of skins and not all of them really work that well but I added in all of them just to see which ones seemed best.

. Because cow. Also,
in a cropduster could be another.