My favorite ever Druid was a human named Cleetus Fernbottom. I modeled him after the idea of the swampbenders in Avatar: The Last Airbender.

He was middle aged, balding, spoke with a Southern accent and was about as wide as he was tall. He was from the swamp and loved all the critters there. But he was tricked into leaving for a life of adventure because his Druid Circle thought he was too dumb. He wasn't the brightest, but he had a heart of gold.

Mechanically he was a Cirlce of the Moon Druid, and I mostly used Thorn Whip as my cantrip and Giant Toad as my wildshape. His primary function was CC.