The zeitgeist with DND druids has always bored me. I play them exclusively evil, as I am finding out just as I think about it now.

There is a middle finger of vecna druid archetype that allows for unique shapeshifts into an abomination. It's a lot of fun to play and the shapeshift options are very versatile and adjustable each shift. I role played a LE human who sook out expediting the heat death of the universe for the Eldritch pantheon. I joined the party as they were already doing a good job leading to the destruction of society. It was all for the purity of nature, of course.

Another I played was a spore druid who was basically Shaggy from Scooby Doo, but evil. The archetype I used was absolutely awful but it came with lots of good stories as I got incredibly high irl to play the character. I conspired with the DM against the party for the glory of Strahd for an entire year of play, and then abandoned the vampire lord when the party started winning the final fight. Convincing the party irl (who was none the wiser but absolutely hated my character) that Strahd was just trying to get in their heads to split the party will probably be my favorite memory of DND for all time.