Just fly 1st class, or business class on overseas flights. I think the spacing is different. (So are the benefits. Long ago, on Pan American JFK to Narita, in 1st class they served Dom Perignon all the way --)
Yeah, just pay the extra 20 bucks to upgrade from Economy to Business on a transpacific flight, or the extra 50 bucks to upgrade to First Class.
Any long-legged person not wanting to get "knee-capped" ought to be willing to pay that.
Regards,