Or there's always the old-school druid of Europe. They're associated with nature, and old gods, and occasional human sacrifice. The most important thing to them, however, would be followers. Their god might not care about the state of nature - after all, the heyday of druids was in the era when Germany was one big forest, what's one tree burned to the ground from time to time? Human worshippers are much more valuable, and nature is a useful tool/focus to encourage such worship. An evil druid would be the kind who enjoys the adulation of the masses, happy or terrified, and will use any means to stay in charge.