At 6’1″, 210 lb. you should have no trouble with most of the motos available out there.
Go to your local dealership, sit or straddle as many motos that your dealer allow you to do so on the showroom floor. Get a feel of what might be comfortable for your physique. Take along a buddy with you, while you straddle the motos, your buddy can hold the moto upright from the forklegs to allow you to try out the seat to peg distance for knee comfort.
Determine what type of riding you plan to do the most, whether it be commuting in city traffic, long distance highway, on/off pavement dual sport rides, twisty canyon carving, multiple day trips.. one moto is not likely to do it all without practice, lots of it.
In my experience, as soons as tempwerature warms up above 40’s for a week the used moto pricing starts to climb… but that’s the eastcoast… don’t know where you are located.