Less known prohibition gangs in Chicago

[Dwalin2014]

The book "The dry and lawless years" by John H. Lyle about the Chicago mafia has on its cover a map of pro-Capone and anti-Capone gangs in Chicago. Among the pro-Capone gangs there are indicated, among others, the Guilfoyle gang, the De Coursey gang, the Murray gang and the McGeoghegan gang.

And on this page
http://www.myalcaponemuseum.com/id159.htm
there are also mentioned the Foley gang and the Oakey gang.

Could please somebody provide any information about any of these gangs? I am only slightly familiar with the Danny McGeoghegan gang, I read he was a bootlegger and a robber, and was once acquitted of murder but then convicted for the Culver bank robbery in 1933. But I know almost nothing about the others, who the bosses were, how did they end up. The DeCoursey gang I never heard of before buying this book, not even once (what were they, French?), and the book only has their territory on the map without providing any text information.

There is also a mention of the Ralph Sheldon gang, he is listed as a Capone ally, but why did he move out of Chicago then, I read he was later pinched for some kidnapping in a town near the Mexico border and died in prison?

[Villain]

The Danny McGeoghegan gang was one of the most ruthless ones and they were mostly involved in bank robberies. In thouse days McGeoghegan was considered one of thew most dangerous men in Chicago. Also Lenny Patrick and his brother Jack were members of the same gang and they all did jail time for the Culver bank robbery