Two excellent pieces of profile writing to note here... one interesting in the work being done by someone and the other for both the work and manner it's being done.
In terms of a feature on someone doing something important towards a greater good, last month's Outside Magazine had "Boilover" on writer and climate-change activist Bill McKibben. Written by Rowan Jacobsen, it's a thorough look at someone perhaps tilting at windmills, but doing so because he believes the efforts of his organization 350.org are important.
The second in-depth profile to mention here doesn't center around as important a topic as climate change and C02 in the atmosphere, but was fascinating in the person featured. For Texas Monthly, "Portrait of the Artist as a Postman" was by Jason Sheeler on Kermit Oliver, the Waco, TX postal employee who also designs heavily in-demand scarves for French fashion brand Hermes. Absolutely remarkable piece on someone with amazing events in their life (particularly the horrifying story of his son being executed by the state of Texas) and who does his craft in a way that works for him.