My husband is 6,2" and we ended up getting him a semi custom Smith Worthington and it has worked out very well for him. He is normally a western rider, but hunts and takes lessons in his SW.
The future Mr. Mukluk is 6’2 with long legs and his horse has the mother of all shark fin withers. We were able to find a smith worthington that worked for both. I am 5’7 and have a 32" inseam. I have an ainsley pro national that works for my long femur and fits my OTTB (who does not sport the shark fin look). Good luck and I do hope you will find something. It’s such a relief when you do!