Hippies. They fit the definition of transcendentalism near perfectly. They don't conform, only to what they believe in. And they are very positive and appreciate nature.
Not an exact example but hopefully it helps spark some ideas??
read the book "into the wild" (thats the book/ movie the third post was talking about)
the guys name was christopher mccandless aka alexander supertramp and i think he did this back in the 90's. really inspiring story and krakauer pieces it together very well. he is a paragon of transcendentalism.