I do this exercise on my own, but it's usually at 5. To answer your question, I should really just look at what I use on a daily basis now, rather than trying to make two knives fit every contingency. I've got big knives, folders, too many 4" fixed blades, neck knives, various multitools, etc., but he fact is most of them aren't used much at all.
For over a year now, I've been using my Fiddleback Forge Bushfinger (production model) in the kitchen, almost exclusively. I just leave it there on the drying rack and use it 2-3 times a day. In the last day alone I've cleaned the silverskin and fat off pork tenderloins, made salsa, cut a banana into my kid's oatmeal, and opened costco packages with that knife. Obviously, it can handle all my outdoorsman stuff as well. It will have limits on both, but I can work within those limits. I don't think I'd even call it my favorite knife, but honestly maybe it is since I use it 5x more than all others combined. It handles beautifully, and is very low maintenance.
Next, sticking with my theme of choosing what I've already tended to use most often, I'm looking at a Vic Farmer or Native 5 LW. Those just tend to make it into my pocket more often than others. I'm not totally crazy about the back lock on the N5, and so I'll switch it out for a Sage 5 (I don't own one...yet. So I'm already breaking my own rule). The Cedric and Ada guy pretty much nails it that this knife is like it was designed by group think to have all the features we all like. Kinda boring, but probably kinda perfect, too. A multitool would be nice, but I want to have a handy folder if that's all I get, just because I like them.