The most room is from a Lepera KingCobra, but it has almost no padding for a passenger. It will move you lower and farther back. Corbin also makes a version. Next best is the Corbin gambler, but about the same deal for the passenger. The best for you to try is a stock Fatboy seat and pillion. the pillion has a slant cut in it that allows you to slide back a few inches. The heritage seat with the nice pillion back support pushed me up into the tank, at least that's how I felt. Good luck, I'm 6'4".