Well you sure have extreme dimensions. It occurs to me that an extra long seat post would actually move you further back from the handle bar and this would mess up your reach. If your saddle is in a reasonable position in relation to the pedals, then I would look for a new and uncut fork. Forks generally come longer than they need to be and are cut down at the bike shop. A new fork would be, say five inches or so longer than what you have now and may be enough to fix the fit. Alternately, there are fort extenders that raise the bars.
It may also be that your saddle is not in a reasonable position and is the cause of knee pain. Seat posts come in a variety of configurations, such as a large amount of set back so the saddle can be moved way aft, or with no set back at all. It may be you need a more experienced bike fitter. Some physiotherapists do bike fitting, something to look into. And at worst, you might need a custom bike and there are plenty of people who build bikes.