Agree. Do not buy a set. Also, agree, if you don't know how to sharpen, learn to do it well. There are no miracle steels that don't need sharpening. The best knife in the world, left unsharpened, is junk.
Most of the brands already mentioned will be fine. There is some beautiful stuff out there; forged blades, through-tangs, etc. Great to display and handle. But none of that beauty makes much difference when using the knife as a tool.
For shopping go to restaurant supply stores like https://www.webstaurantstore.com/2821/kitchen-cutlery.html In our market we can buy at Restaurant Depot https://www.restaurantdepot.com/ without a membership, so that is a nice way to browse serious knives.
We have a number of the fancy knives, but lately I have been buying mostly Dexter. This is professional stuff and the prices are rock bottom.
For starters: A slicer with a Granton edge, a bread knife, a chef's knife, and a boning knife. Plus the small knives you already have, freshly sharpened.
For sharpening I just use stones and steels, but there is an infinite variety of clever gadgets out there and many people swear by one or another of them. The first sharpening tool(s) you buy will probably just teach you what you really wanted, so don't obsess over the decision.