Going anywhere the evil isn't involved is hard. I'd say that the human nature has the capacity for evil, as much as it has the capacity for good. Anywhere you go with the intent to do good, you have prospects of seeing evil, because you're going to work with humans, and especially their social structures.

Maybe one can get into e.g. pure mathematics. Proving a conjecture usually does not have a direct societal impact, so it's can't be evil. By the same token, it doesn't do anything obviously good.