within FR even druids get their magic from a specific diety just as a cleric would. The closest god there is to a "nature incarnate" is Silvanus. He is NN and his main goal is the preservation of balance within nature. Some of his more miltant druids interpret this to mean the dominance of nature over civilization. Janath (aka Chauntea) used to be the actual embodiment of the world of Toril, but over time she has come to represent the more agricultural side of the natural world (save for a few hold outs who still revere her more wild side) this has occasionally put her at odds with Silvanus as she seeks to find ways to bring nature into civilization. They are the predominant nature deities. Then there are deities who largely serve Silvanus and focus on more specific aspects of nature. The various pantheons typically have a nature diety that usually reflects that particular races outlook on nature.

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Happiness is not a goal; it is a by-product.
-Eleanor Roosevelt.