Saban DID quit on him - two times.
The first time was one week after winning his second AFL championship in 1965. The 1966 Bills were 9-4 without Saban, but got killed in the AFL championship game. The second time was after starting the 1976 season 2-3, leaving the Bills to finish 2-12 with Jim Ringo.
Saban is a member of the Greater Buffalo Sports HOF.
I do not believe Saban is NFL HOF material but I believe an argument can be made for his induction to the Bills Wall of Fame. I am not a big Ralph Wilson fan, but without knowing Wilson personally, how can you possibly believe that he got satisfaction from outliving Saban??
Cookie certainly was a difficult man to deal with. He was the first RB to exceed 1,000 yards in a 14 game season, but was only a Bill for three seasons. I admire him for boycotting the 1965 AFL All-Star game during the Civil Rights movement, ironically because of poor treatment of black athletes in New Orleans. All Star Boycott
Again I would agree he probably deserves a place on the WOF, but probably not the HOF.
Just my opinions.