1. Buck - by far. With models like the 110, 112, 500s, 102, 119, 301, 303, and 309 you can probably find the the right knife for you
2. Case - their smaller CV knives are still great
3. Victorinox - I've never seen perfection in one company that mass produces knives, but Vic is as close as it gets. F&F is great, constancy is off the charts good
Notable mention - KA-BAR, Leatherman
I would like to try GEC but they're too expensive for me at this point.