Not surprisingly I'd go for Freddie Goodwin
You beat me to it although Cattlin and Coppell are on my short list.
I've always felt that Mike Bailey's sacking was the first stage of the Albion's decline that lead to the club leaving the Goldstone.
Allow me this rare opportunity to disagree with you!
I thought bailey, great player though he was, a one trick pony as manager. Sure we pulled off some fine away wins and the cavalier Albion became a dour side that defended in depth and hit teams on the break to get one goal wins.
For a season that was great, winning at Spurs, Anfield, winning at saints when they could have gone top of the league. But then teams sussed us. Going away was awfull because it would be dour until we let in a goal then it was game over as we had nothing to come back with. I also remember losing 4-1 to an awfull Notts County team.
He did little on leaving us. Strange because he was a bucaneering midfielder with Wolves.
For all the good that we got from the Cup Final I think that the contracts given out by Mike Bamber was the start of the decline as we couldnt afford that kind of money and when , the name has gone, Townsend Thorensen director, our vice chairman, got killed in the plane crash we never seemed to recover and eventually that lead to the situation with A B & S.
I was getting to this BG. Bailey was sacked because his team's tactics lead to a marked decline in attendances (and therefore gate receipts). This left insufficent income to cover the expenditure (10 year contract for Fozzie wasn't it?) and whilst the 1983 cup final euphoria etc temporarily masked the picture, the writing was clearly on the wall by the following season.
I'd forgotten about Keith Wickenden's death - a tragedy for BHA as well as his family.