I'm 6'7 and 220.
I paddle a Tiderace Xplore. I fit in even without having the footpegs all the way at the end of the track.
I also demoed a bunch of boats at the nw paddle fest a few weeks ago.
The valley Etain 17.7 will definitely fit you, the Valley Nordkapp may fit you. The primary stability of the Nordkapp is much lower than the Etain so will feel different. The Etain turns much tighter than my Xplore and was my favorite of all the boats I demoed. I could have spent all day in that boat. Tiderace also has the Xplore-X which is 2 inches wider and even higher front deck and more volume but I felt it was too big for me.
I got my boat at Kayak Academy near Seattle. They have Valley and Tiderace boats along with other high end boats. They also have a big Impex boat that will fit you. Arrange a demo paddle if you are in Seattle.
I get out in my boat 2-3 days a week and have had it in everything from 7kt tide races to big swell and surf out on the coast and it's a good all-round boat. Touring I end up carrying everyone else's crap they can't fit in their low volume boats and 8 inch round hatches. Tight turns while rock gardening are definitely not easy compared to a Romany or other 'turny' boat but the plastic Etain would be a better choice if you want to rock garden tons.