The reality is that a good cook only NEEDs one knife for all of his or her uses; a simple 8 or 10 inch chef's knife of good quality, hand feel, etc. When has that stopped any of us though...
I don't think you're going to find a magic bullet that will make your wife happy, or keep you from working on knives. It's a weird reality that women don't like knives, don't care for them, but often use them all the time.
It comes down to the differences between woman cooks and men cooks: women cook to make the family happy, put food on the table, and move on to the next thing. When men cook they want everybody to have spontaneous orgasms of euphoric delight, jumping up and down and screaming in pleasure. For this men buy toys and toys and toys to make their kitchen just that much more refined and efficient and cool. Women want nice clean pots that look decent and don't get in their way.
Make her kitchen as brainless as possible, and you will have less problems. Buy a nice soft cutting board; one of those translucent poly cutting boards, the bigger the better is the easiest and nearly best choice. You can usually find good ones, if you look carefully, everywhere. Even wallyworld has them; just look for the ones that are made in the US, they are very very good. Don't remember the brand name. Buy one that you think is impractically big. You and your wife will be amazed at the efficiency increase. You will also notice that the knife will find itself sitting on the cutting board while the food is in the pan, instead of banging around on the counter. If you have any questions, go to a decent restaurant where you can see the kitchen. They will most likely have exactly the big poly cutting boards I'm talking about. Ask them which supply house they get them from, or if you can buy one when they make their next purchase.
The best option is to use a butcher block. The cheapest way to get one is to befriend an arborist in your town. He will cut down at least half a dozen maples and oaks a year. Ask him to slice you a 4 inch thick piece of one of those trees; use a planer or lots of sandpaper to make it smooth on both sides. Let it dry out for at least a couple of weeks, preferably a couple months, and then oil it with something like mineral oil. This board will last you most of your life; when it's nicked up, just sand the top 1/8" off it.
Another source of good butcher blocks is ROSS dress for less or marshall's. They have some very good maple blocks made in Vermont for less tha $40. Find the size you like, and then get the size bigger.
Then politely, gently and with love ask your wife to not put the knives in the dishwasher. Tell her to leave them on the countertop, and you'll wash them.
This is the way to a happy knife kitchen, and minimizes the chance of knife-related divorce.
Trust me: the answer is not in the knives you buy, nor in how much you want to teach your wife. The answer is in making good "idiot-proof" choices. I'm not calling your wife an idiot, just that most wives behave idiotically with their kitchen implements. They don't care how much time you spend sharpening, or how hard the steel is. They only care that the tomato gets sliced.