World's Strongest Man and Game of Thrones actor, the Icelandic Hafþör Júlíus Björnsson (6 foot 9) and his tiny (5 foot 2) Canadian wife Kelcey Henson have a pretty large height difference. He got married to Kelcey last year. They have already celebrated their 1st anniversary.
Their marriage is the cutest thing I have ever seen. It's absolutely adorable and endearing when the man is much much taller than the girlfriend or wife. I also bet she feels very safe with him when out in public.
(He's almost her height when on his knees as the pic above demonstrates).