As a fellow tall person, I've idly wondered (but no more than that) if there could be cause to petition for people above some height (6'2" maybe? hard to say since it's really hip height and femur length that matter) to be considered a protected class, requiring a free upgrade if a certain minimum leg room was not available in a standard seat. I've had to do trans-Atlantic flights with my knees smashed, surviving only by frequent standeeism and my wife's good graces letting me take up part of her seat space.
I've seen some people use devices to block the person in front of them from reclining, but I'd rather not be that level of asshole. On the other hand often on domestic flights my knees are that device.