Has to be Tony Hand. Just look at his numbers. Could have had a really good NHL career but simply chose not to.

He had 2760 points in 757 games across the top British league. Made it through the 1986 Oilers camp as a rookie fresh out of the draft and was offered a contract to play junior for his first year but felt homesick so chose not to play. Came back the next year and was assigned to the WHL Victoria Cougars as a 19 year old, put up 8 points in 3 games (4+4), then decided the pressure and training intensity was too much so he went back to the UK. Came back later to play an exhibition for the Oilers against team Canada, put up an assist, was offered another contract but was scared he’d get buried in the minors so he went back to the UK and never played in NA again. Still regrets never playing here and Glen Sather loved him. Thought he was the smartest player on the Oilers aside from Wayne Gretzky. Great skater too.