My favorite SAK of old would be the Explorer. That said, I think it is a little to wide to make a comfortable everyday carry. I think that 3 layers is the thickest I would go with Victorinox, with the 2 layer being more preferable. I am in the process of trying to decide between the Compact and the Super Tinker (I will probably end up with both). The Yeoman would be another 3 layer option, but I only think it is currently available in limited quantities through swissbianco.
I wish Victorinox would make a 2 layer Compact with scissors, large blade, multi opener, plus the front side philips in the smaller 84 mm size. That would be the perfect EDC SAK in my opinion.