GOOD LUCK
The very geometry of geodesic dome pup tents (aka "free standing") is such that they don't accommodate tall people until you are looking at a 4 to 5 person dome. The stated floor dimensions can be very deceiving. At best they give you the length of the projected floor, but often they are the fly measurements or even to the peg loops. What they never give is the plane extending from the top of your head to the tip of your toes when lying on your back, which can be a foot shorter than the floor. This results in the "tent-on-your-face syndrome." One of the main benefits I see in dome tents is a lot of them can be set up on the showroom floor. I suggest you crawl into any tent you are interested in and lay on you back on top of an inflated air mattress. Remember when the tent gets wet the nylon will sag a bit.
I realize I am very much in the minority, perhaps 1 out of 100, but when I tour solo I use a one person A frame pup tent >2lb. With my wife, we use a three person teepee tent with a single pole. I am sure there must be some place where I couldn't set up a non-freestanding tent, but after decades of camping I have yet to come across it.