I don't know any specific knives off the top of my head, I'm not too into fixed blades.
1. Urban: Medium sized fixed blade say 6 inches maybe more. No more than 3/16 no less than 1/8 thick. 1095 or properly done tool steel g10 or micarta handle
2. Jungle: Large 15+ inch blade 1/8-3/16 machete, high end stainless steel micarta handle.
3. Mountainous: 3/16+ 10-15 inch edge, fixed blade with a high end tool steel.
The junglas actually seems to fit what I would want for all three really. Like I said though I'm not too into the fixed blade world so I'm sure there are knives that fit my descriptions and if I actually get some fixed blades and test them my opinion will change. I would def. take a fixed though if my life depends on it. I don't need no lock failing or anything when I'm starving trying to do whatever.