So here are a few suggestions to throw into the hat. The names are in no particular order, and hardness on the pitch has been carelessly blurred with 'being a bit of a nutter'. Current players are not included.
The son of a policeman, Doyle was taught to fight at his dad's police gym as a child after his father discovered he was having problems with some local kids.
A tough-tackler on the pitch, he was just as uncompromising off it. Doyle nurtured a genuine hatred of all things United, and took great delight in stoking up rivalries wherever possible.
'The night before a derby, I would go on ITV with Gerald Sinstadt and tell United we were going to thrash them, And why not? It was absolutely true. We were gutted the year we got United relegated, because while they were on the fixture list, it was a guaranteed 4 points every season. They might have had Best, Charlton and Law but when we played them it was a piece of p***,' he once told The Sun.
Time has failed to mellow the old warrior. His 2004 autobiography, Blue Blood, even has a chapter entitled 'Why I Hate United'.
The banner at Old Trafford that mocks our lack of success is a particular source of annoyance for Doyle. "I'd love to walk to the top of the Stretford End and rip that f***ing flag down," he once told the Independent.
A legend at Bristol City and, in my opinion, the key player in our 1981 Cup final team.
'If only a man like Gerry Gow was still playing today to act as role model for today's cosseted youth, brought up on suspect body shaving metrosexuals like Man USA's Ronaldo,' writes the author of this tribute to the Glaswegian Man of Steel.
When Malcolm Allison suggested signing the young winger in 1967, Joe Mercer's reaction was less than enthusiastic: 'Oh no, not Tony Coleman, no, no. I was at Lilleshall when he threw a bed out of the window. He did all sorts. No, Malcolm. No. He was in serious trouble with a referee'.
'He had a crew-cut, seemed to have tattoo marks all over his arms, wore jeans and a T-shirt, and spoke with a Scouse accent you could almost cut with a knife,' wrote Mike Doyle, who attended the same course at Lilleshall. Doyle believed the bed incident was a result of Coleman merely wanting 'to inject some excitement into what he felt was becoming a repetitive sort of existence'.
But Coleman proved an inspired choice for City, despite his lack of goals ('I don't like being kissed', was his reasoning for not scoring that often). Even Mercer was to later regard him with something approaching affection.
"Tony Coleman? I was the only manager he didn't hit," he once remarked.
"Big' Dave Ewing
The centre half played 279 games at 1953 and 1962. As that was a bit before my time, here are a few memories from Leo Fewtrell at McVittee:
'For Dave the player, marking an opponent usually meant exactly that. l was fortunate enough to get to know him well when he was coaching the Reserve team in the seventies. The players at the time all gave him plenty of respect because he was quite capable of knocking the sh*t out of all of them.'
A tough-tackling centre-half who's fondly remembered by Nimrod at Citymancs for once knocking Charlie George about 10 foot in the air after the Arsenal player had done a wonderful solo run.
According to a poster at the MEN, Heslop meted out the same treatment to Alan Ball.
Famous for this punch-up with Norman Hunter, Lee was prepared to use his fists off the field too.
Rodney Marsh recalls one such incident form their playing days in his autobiography, Priceless.
The pair were in a club in Manchester's Piccadilly, but after getting abuse from a group of United fans they finished their drinks and left. The United fans followed them out and continued with the insults: "You City players haven't got the balls," said one.
'This wound Franny up. He turned on the guy and said to him, 'OK. You can have the first one’.
The guy smashed a right-hander into Franny's face, but Franny didn't budge an inch, hardly even flinched. Then he really started to lay into the guy. A couple of his mates steamed in to help but I pulled them off.
'Leave it,' I said to them. 'If they want to have a knuckle, let 'em have it'.
Franny gave the guy a real beating. There was blood everywhere. When the police arrived Lee was taken down the station and released early the next morning. Amazingly the press didn't get hold of it.
Below is my favourite ever photo of Lee, plus an example of why British society is going to the dogs.
Click on photos to see full-size image
And here are a few more that fall more into the 'biggest nutter' category:
I forget where I read this, but apparently Big Joe really hated being beaten in training. If anyone chipped him from outside the box he’d lose his temper and chase them around the pitch.
Known as the 'bearded viking', Grealish makes the subs bench in the Rotherham United 'most mentally disturbed 11'. (Gow is in the starting lineup). 'He would be one of those uncles who would take his nephews/nieces to Macdonalds and buy them burgers until they were sick,' is Rotherham fan Alan Todd's considered assessment.
Fondly remembered by Gavin at Citymancs for punching Palace's Mark Bright (details here).
Left City as a youngster following a series of off-field incidents. Nearly got lynched by Sunderland fans a few years later for failing to show complete respect to the FA Cup winners.
~ And just to prove that bad-boy behaviour is nothing new, here's a newspaper story from 1903 about three City players who were fined by magistrates for 'behaving in a disorderly manner'.
~ There's a very funny story about George Heslop's wig over at Arsenal News Review.