I'm a big fan of Naked and Marooned with Ed Stafford. It ran for 3 seasons where he would be dropped off naked in different locations for a week at a time with nothing more than a camera pack and a first aid kit. His aim was to live off the land for the time he was there from making make-shift shoes and usually some kind of grass skirt, to making a fire out of rubbing sticks or finding the right stones to strike together and using self-made traps for food. He came across as being more genuine than Bear Grills, especially after he was exposed over-dramatising a lot of his stuff.
He's not doing the series anymore and the last one that he did was Ed Stafford: Into The Unknown but that one has finished now too. It seems that these days The Discovery Channel isn't so concerned with making informative shows any more, after cutting the funding for Mythbusters, before finally deciding to cancel the show. I've heard there's the White Rabbit Project now hosted by the past junior Mythbusters Carrie, Grant and Tory on Netflix but I haven't seen any of it.
I also used to watch Ray Mears back in the day!